{"title":"Certikin Main Drains","description":"","products":[{"product_id":"6-main-drain-with-anti-vortex-grille-white-hd33","title":"6\" Main drain with anti vortex grille - White","description":"There is a type of Certikin Main Drain (sump) available to suit every swimming pool. Main drains are used to draw the base water for filtering and are also used as the principle method of emptying the swimming pool.  The HD33 is suitable for both concrete and liner domestic pools and features Certikin's unique grille design.   On both concrete and liner models, the grille is fixed in place with stainless steel screws for added safety. \u003cbr\u003e\u003cbr\u003eWe also have commercial main drains with a variety of flow rates to choose from - commercial drains are available as frame and grille only or as a complete drain with a body. On commercial or shallow pool applications stainless steel main drain grilles must be used.  A reinforced grille is available for commercial drains intended for use in shallow pools - please contact us for details.\u003cbr\u003e\u003cbr\u003eWhen choosing sump size always assume that total flow may be directed to the plant room via the sump(s)  sump size should be chosen accordingly.  In normal conditions flow will be divided between surface draw-off and sump(s) in ratio: 70% Surface\/30% sump  Skimmer or 50% Surface\/50% sump  Deck Level.\u003cbr\u003e\u003cbr\u003eImportant - Main drains must be arranged so that there is no risk of bathers being drawn towards them or trapped there. It is recommended that on all installations, including domestic, a minimum of 2 x main drains are installed 2 metres apart.\u003ch4\u003eDownload Data Sheets\u003c\/h4\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Technical Drawings \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_17c34225-d92c-4d97-a8e8-f3067fe835a8\/original\/HD33_CAD-69.pdf\" target=\"_blank\" class=\"underline\"\u003e HD33 Drawing \u003c\/a\u003e \u003c\/li\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_4ee8c839-5ff1-406d-aee8-10438ea9f9c8\/original\/HD33-70.dwg\" target=\"_blank\" class=\"underline\"\u003e HD33 DWG File \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Installation manual \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_f9398af4-95dc-4b2d-95ee-6937e6f7cb9c\/original\/Certikin_maindrain_manual-73.pdf\" target=\"_blank\" class=\"underline\"\u003e Installation manual Main Drains EN FR IT + \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748391911770,"sku":"HD33","price":63.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/CTK_262x262_M-AIGUA_d16b7f1b-a041-47eb-9aa0-2dcf66914c93.png?v=1753319827"},{"product_id":"main-drain-c-w-hydro-relief-valve-collection-tube-bush-and-nipple-white-plug-bush-and-nipple-white-zz0302","title":"Main drain c\/w hydro relief valve, collection tube, bush and nipple, White plug bush and nipple - White","description":"There is a type of Certikin Main Drain (sump) available to suit every swimming pool. Main drains are used to draw the base water for filtering and are also used as the principle method of emptying the swimming pool. The HD33 is suitable for both concrete and liner domestic pools and features Certikins unique grille design. Both concrete and liner types come complete with self-tapping fixings screws for added safety, and this product is manufactured in white ABS, though stainless steel drains are also available. We also have commercial main drains with a variety of flow rates to choose from - commercial drains are available as frame and grille only or as a complete drain with a body. \u0026gt;On commercial or shallow pool applications stainless steel main drain grilles must be used. A reinforced grille is available for commercial drains intended for use in shallow pools - please contact us for details.\u003cbr\u003eWhen choosing sump size always assume that total flow may be directed to the plant room via the sump(s) sump size should be chosen accordingly. In normal conditions flow will be divided between surface draw-off and sump(s) in ratio: 70% Surface\/30% sump Skimmer or 50% Surface\/50% sump Deck Level.\u003cbr\u003eImportant - Main drains must be arranged so that there is no risk of bathers being drawn towards them or trapped there. It is recommended that on all installations, including domestic, a minimum of 2 x main drains are installed 2 metres apart.","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748392206682,"sku":"ZZ0302","price":97.68,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/ZZ0302_69609_CTX_FOT_HD33_SUMIDEROABS_1656_3.jpg?v=1753319830"},{"product_id":"6-main-drain-with-anti-vortex-grille-grey-hd33c-plus-g","title":"6\" Main drain with anti vortex grille - Grey","description":"There is a type of Certikin Main Drain (sump) available to suit every swimming pool. Main drains are used to draw the base water for filtering and are also used as the principle method of emptying the swimming pool.  The HD33 is suitable for both concrete and liner domestic pools and features Certikin's unique grille design.   On both concrete and liner models, the grille is fixed in place with stainless steel screws for added safety. \u003cbr\u003e\u003cbr\u003eWe also have commercial main drains with a variety of flow rates to choose from - commercial drains are available as frame and grille only or as a complete drain with a body. On commercial or shallow pool applications stainless steel main drain grilles must be used.  A reinforced grille is available for commercial drains intended for use in shallow pools - please contact us for details.\u003cbr\u003e\u003cbr\u003eWhen choosing sump size always assume that total flow may be directed to the plant room via the sump(s)  sump size should be chosen accordingly.  In normal conditions flow will be divided between surface draw-off and sump(s) in ratio: 70% Surface\/30% sump  Skimmer or 50% Surface\/50% sump  Deck Level.\u003cbr\u003e\u003cbr\u003eImportant - Main drains must be arranged so that there is no risk of bathers being drawn towards them or trapped there. It is recommended that on all installations, including domestic, a minimum of 2 x main drains are installed 2 metres apart.\u003ch4\u003eDownload Data Sheets\u003c\/h4\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Leaflet \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_8236a6dd-c2ae-46cd-ace7-82765a4d7d01\/original\/certikinoptimusfittings-208903.pdf\" target=\"_blank\" class=\"underline\"\u003e Leaflet EN \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Installation manual \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_f9398af4-95dc-4b2d-95ee-6937e6f7cb9c\/original\/Certikin_maindrain_manual-73.pdf\" target=\"_blank\" class=\"underline\"\u003e Installation manual Main Drains EN FR IT + \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Technical Drawings \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_4ee8c839-5ff1-406d-aee8-10438ea9f9c8\/original\/HD33-70.dwg\" target=\"_blank\" class=\"underline\"\u003e HD33 DWG File \u003c\/a\u003e \u003c\/li\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_17c34225-d92c-4d97-a8e8-f3067fe835a8\/original\/HD33_CAD-69.pdf\" target=\"_blank\" class=\"underline\"\u003e HD33 Drawing \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748392829274,"sku":"HD33C+G","price":105.24,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/HD33C_G_236745_hd33cg_33190_1.jpg?v=1753319832"},{"product_id":"main-drain-c-w-plug-bush-and-nipple-grey-zz0301-plus-g","title":"Main drain c\/w plug bush and nipple - Grey","description":"The choice of pool fittings can make or break the overall impression of a pool. To add that perfect finishing touch and extend the options available, Certikin offer the attractive Optimus range of flow fittings.\u003cbr\u003e\u003cbr\u003eSuitable for both liner and concrete pools, the Optimus range blends beautifully with darker pool finishes as it comes in an attractive metallic grey or black plastic.\u003cbr\u003e\u003cbr\u003eWith the popularity of salt chlorinators on the increase this new range offers the ideal solution for corrosion free flow fittings. Products include skimmers and extension throats, wall inlets, vacuum points and main drains with anti vortex grille.\u003ch4\u003eDownload Data Sheets\u003c\/h4\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Leaflet \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_8236a6dd-c2ae-46cd-ace7-82765a4d7d01\/original\/certikinoptimusfittings-208903.pdf\" target=\"_blank\" class=\"underline\"\u003e Leaflet EN \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748392894810,"sku":"ZZ0301+G","price":115.92,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/ZZ0301_G_329762_ZZ0352_G_1.jpg?v=1753319835"},{"product_id":"main-drain-c-w-hydro-relief-valve-collection-tube-bush-and-nipple-white-plug-bush-and-nipple-grey-zz0302-plus-g","title":"Main drain c\/w hydro relief valve, collection tube, bush and nipple, White plug bush and nipple - Grey","description":"The choice of pool fittings can make or break the overall impression of a pool. To add that perfect finishing touch and extend the options available, Certikin offer the attractive Optimus range of flow fittings.\u003cbr\u003e\u003cbr\u003eSuitable for both liner and concrete pools, the Optimus range blends beautifully with darker pool finishes as it comes in an attractive metallic grey or black plastic.\u003cbr\u003e\u003cbr\u003eWith the popularity of salt chlorinators on the increase this new range offers the ideal solution for corrosion free flow fittings. Products include skimmers and extension throats, wall inlets, vacuum points and main drains with anti vortex grille.\u003ch4\u003eDownload Data Sheets\u003c\/h4\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Leaflet \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_8236a6dd-c2ae-46cd-ace7-82765a4d7d01\/original\/certikinoptimusfittings-208903.pdf\" target=\"_blank\" class=\"underline\"\u003e Leaflet EN \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748393812314,"sku":"ZZ0302+G","price":145.2,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/ZZ0302_G_329940_ZZ0352_G_2.jpg?v=1753319837"},{"product_id":"6-main-drain-with-anti-vortex-grille-black-hd33c-plus-b","title":"6\" Main drain with anti vortex grille - Black","description":"There is a type of Certikin Main Drain (sump) available to suit every swimming pool. Main drains are used to draw the base water for filtering and are also used as the principle method of emptying the swimming pool.  The HD33 is suitable for both concrete and liner domestic pools and features Certikin's unique grille design.   On both concrete and liner models, the grille is fixed in place with stainless steel screws for added safety. \u003cbr\u003e\u003cbr\u003eWe also have commercial main drains with a variety of flow rates to choose from - commercial drains are available as frame and grille only or as a complete drain with a body. On commercial or shallow pool applications stainless steel main drain grilles must be used.  A reinforced grille is available for commercial drains intended for use in shallow pools - please contact us for details.\u003cbr\u003e\u003cbr\u003eWhen choosing sump size always assume that total flow may be directed to the plant room via the sump(s)  sump size should be chosen accordingly.  In normal conditions flow will be divided between surface draw-off and sump(s) in ratio: 70% Surface\/30% sump  Skimmer or 50% Surface\/50% sump  Deck Level.\u003cbr\u003e\u003cbr\u003eImportant - Main drains must be arranged so that there is no risk of bathers being drawn towards them or trapped there. It is recommended that on all installations, including domestic, a minimum of 2 x main drains are installed 2 metres apart.\u003ch4\u003eDownload Data Sheets\u003c\/h4\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Leaflet \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_8236a6dd-c2ae-46cd-ace7-82765a4d7d01\/original\/certikinoptimusfittings-208903.pdf\" target=\"_blank\" class=\"underline\"\u003e Leaflet EN \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Installation manual \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_f9398af4-95dc-4b2d-95ee-6937e6f7cb9c\/original\/Certikin_maindrain_manual-73.pdf\" target=\"_blank\" class=\"underline\"\u003e Installation manual Main Drains EN FR IT + \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Technical Drawings \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_4ee8c839-5ff1-406d-aee8-10438ea9f9c8\/original\/HD33-70.dwg\" target=\"_blank\" class=\"underline\"\u003e HD33 DWG File \u003c\/a\u003e \u003c\/li\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_17c34225-d92c-4d97-a8e8-f3067fe835a8\/original\/HD33_CAD-69.pdf\" target=\"_blank\" class=\"underline\"\u003e HD33 Drawing \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748394139994,"sku":"HD33C+B","price":105.84,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/HD33C_B_236744_hd33cb_33185_2.jpg?v=1753319840"},{"product_id":"main-drain-c-w-plug-bush-and-nipple-black-zz0301-plus-b","title":"Main drain c\/w plug bush and nipple - Black","description":"The choice of pool fittings can make or break the overall impression of a pool. To add that perfect finishing touch and extend the options available, Certikin offer the attractive Optimus range of flow fittings.\u003cbr\u003e\u003cbr\u003eSuitable for both liner and concrete pools, the Optimus range blends beautifully with darker pool finishes as it comes in an attractive metallic grey or black plastic.\u003cbr\u003e\u003cbr\u003eWith the popularity of salt chlorinators on the increase this new range offers the ideal solution for corrosion free flow fittings. Products include skimmers and extension throats, wall inlets, vacuum points and main drains with anti vortex grille.\u003ch4\u003eDownload Data Sheets\u003c\/h4\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Leaflet \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_8236a6dd-c2ae-46cd-ace7-82765a4d7d01\/original\/certikinoptimusfittings-208903.pdf\" target=\"_blank\" class=\"underline\"\u003e Leaflet EN \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748394238298,"sku":"ZZ0301+B","price":114.6,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/ZZ0301_B_329942_ZZ0352_B.jpg?v=1753319842"},{"product_id":"main-drain-c-w-hydro-relief-valve-collection-tube-bush-and-nipple-white-plug-bush-and-nipple-black-zz0302-plus-b","title":"Main drain c\/w hydro relief valve, collection tube, bush and nipple, White plug bush and nipple - Black","description":"The choice of pool fittings can make or break the overall impression of a pool. To add that perfect finishing touch and extend the options available, Certikin offer the attractive Optimus range of flow fittings.\u003cbr\u003e\u003cbr\u003eSuitable for both liner and concrete pools, the Optimus range blends beautifully with darker pool finishes as it comes in an attractive metallic grey or black plastic.\u003cbr\u003e\u003cbr\u003eWith the popularity of salt chlorinators on the increase this new range offers the ideal solution for corrosion free flow fittings. Products include skimmers and extension throats, wall inlets, vacuum points and main drains with anti vortex grille.\u003ch4\u003eDownload Data Sheets\u003c\/h4\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Leaflet \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_8236a6dd-c2ae-46cd-ace7-82765a4d7d01\/original\/certikinoptimusfittings-208903.pdf\" target=\"_blank\" class=\"underline\"\u003e Leaflet EN \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748395221338,"sku":"ZZ0302+B","price":145.2,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/ZZ0302_B_329941_ZZ0352B_1.jpg?v=1753319844"},{"product_id":"main-drain-c-w-flat-grille-white-hd33d","title":"Main drain c\/w flat grille - White","description":"There is a Certikin Main Drain (sump) available to suit every swimming pool. Main drains are used to draw the base water for filtering and are also used as the principle method of emptying the swimming pool.  The HD33 is suitable for both concrete and liner domestic pools and features Certikin's unique grille design.   On both concrete and liner models, the grille is fixed in place with stainless steel screws for added safety. \u003cbr\u003e\u003cbr\u003eWe also have commercial main drains with a variety of flow rates to choose from - commercial drains are available as frame and grille only or as a complete drain with a body. On commercial or shallow pool applications stainless steel main drain grilles must be used.  A reinforced grille is available for commercial drains intended for use in shallow pools - please contact us for details.\u003cbr\u003e\u003cbr\u003eWhen choosing sump size always assume that total flow may be directed to the plant room via the sump(s)  sump size should be chosen accordingly.  In normal conditions flow will be divided between surface draw-off and sump(s) in ratio: 70% Surface\/30% sump  Skimmer or 50% Surface\/50% sump  Deck Level.\u003cbr\u003e\u003cbr\u003eImportant - Main drains must be arranged so that there is no risk of bathers being drawn towards them or trapped there. It is recommended that on all installations, including domestic, a minimum of 2 x main drains are installed 2 metres apart.\u003ch4\u003eDownload Data Sheets\u003c\/h4\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Technical Drawings \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_9a5c20d0-a93f-4819-8695-8623abbc7e44\/original\/HD33D.dwg\" target=\"_blank\" class=\"underline\"\u003e HD33D DWG File \u003c\/a\u003e \u003c\/li\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_c9dfc6e9-07b1-4ea2-8f59-daa636d2ab4c\/original\/HD33D.pdf\" target=\"_blank\" class=\"underline\"\u003e HD33D Drawing \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748395483482,"sku":"HD33D","price":56.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/HD33D_234242_hd33d_211500_4.png?v=1753319846"},{"product_id":"main-drain-c-w-plug-bush-and-nipple-white-zz0352","title":"Main Drain c\/w plug bush and nipple - White","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eThe \u003cstrong data-end=\"50\" data-start=\"4\"\u003eMain Drain c\/w Plug, Bush \u0026amp; Nipple – White\u003c\/strong\u003e is designed to provide reliable base water extraction and circulation support in pool filtration systems.\u003cbr\u003e\u003cbr data-end=\"159\" data-start=\"156\"\u003eIt helps draw water from the lowest point of the pool, supporting efficient overall water movement and system balance. Supplied complete with plug, bush, and nipple for a secure and practical installation within compatible pool setups.\u003cbr\u003e\u003cbr data-end=\"399\" data-start=\"396\"\u003eManufactured for durability in aquatic environments, ensuring long-term performance and dependable operation. A key component for maintaining effective circulation and supporting safe, consistent pool water management.\u003c\/p\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748396073306,"sku":"ZZ0352","price":95.16,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/ZZ0352_69609_CTX_FOT_HD33_SUMIDEROABS_1656_2.jpg?v=1753319849"},{"product_id":"main-drain-c-w-hydro-relief-valve-collection-tube-bush-and-nipple-white-plug-bush-and-nipple-white-zz0353p","title":"Main Drain c\/w hydro relief valve, collection tube, bush and nipple, White plug bush and nipple - White","description":"\u003cp\u003eThe \u003cstrong\u003eMain Drain c\/w Hydro Relief Valve, Collection Tube, Bush \u0026amp; Nipple – White\u003c\/strong\u003e is designed to support safe and efficient water removal from the base of pool systems.\u003cbr\u003eIt helps maintain balanced circulation while the integrated hydro relief valve assists in pressure management during operation.\u003cbr\u003e\u003cbr\u003eSupplied complete with collection tube, bush, nipple, and plug for a fully coordinated and secure installation. Built for durability in aquatic environments, ensuring reliable long-term performance and system stability.\u003cbr\u003e\u003cbr\u003eA comprehensive drainage solution for maintaining effective flow and safe pool water management.\u003c\/p\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748396564826,"sku":"ZZ0353P","price":116.58,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/ZZ0353P_69609_CTX_FOT_HD33_SUMIDEROABS_1656_3.jpg?v=1753319851"},{"product_id":"6-main-drain-with-anti-vortex-grey-hd33l-plus-g","title":"6\" Main Drain with Anti Vortex - Grey","description":"There is a type of Certikin Main Drain (sump) available to suit every swimming pool. Main drains are used to draw the base water for filtering and are also used as the principle method of emptying the swimming pool.  The HD33 is suitable for both concrete and liner domestic pools and features Certikin's unique grille design.   On both concrete and liner models, the grille is fixed in place with stainless steel screws for added safety. \u003cbr\u003e\u003cbr\u003eWe also have commercial main drains with a variety of flow rates to choose from - commercial drains are available as frame and grille only or as a complete drain with a body. On commercial or shallow pool applications stainless steel main drain grilles must be used.  A reinforced grille is available for commercial drains intended for use in shallow pools - please contact us for details.\u003cbr\u003e\u003cbr\u003eWhen choosing sump size always assume that total flow may be directed to the plant room via the sump(s)  sump size should be chosen accordingly.  In normal conditions flow will be divided between surface draw-off and sump(s) in ratio: 70% Surface\/30% sump  Skimmer or 50% Surface\/50% sump  Deck Level.\u003cbr\u003e\u003cbr\u003eImportant - Main drains must be arranged so that there is no risk of bathers being drawn towards them or trapped there. It is recommended that on all installations, including domestic, a minimum of 2 x main drains are installed 2 metres apart.\u003ch4\u003eDownload Data Sheets\u003c\/h4\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Leaflet \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_072e1fbe-8428-4954-ba03-18da9588e9fb\/original\/certikinoptimusfittings-208904.pdf\" target=\"_blank\" class=\"underline\"\u003e Leaflet EN \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Installation manual \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_f9398af4-95dc-4b2d-95ee-6937e6f7cb9c\/original\/Certikin_maindrain_manual-73.pdf\" target=\"_blank\" class=\"underline\"\u003e Installation manual Main Drains EN FR IT + \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Technical Drawings \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_a10e27b8-2e92-40ef-8e02-be278b4b7e6d\/original\/HD33L.dwg\" target=\"_blank\" class=\"underline\"\u003e HD33L DWG File \u003c\/a\u003e \u003c\/li\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_5450f318-971a-4603-95f9-774ce451aa12\/original\/HD33L.pdf\" target=\"_blank\" class=\"underline\"\u003e HD33L Drawing \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748396663130,"sku":"HD33L+G","price":136.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/HD33L_G_309269_HD33C_G_main_drain_grey_15.png?v=1753319854"},{"product_id":"main-drain-c-w-plug-bush-and-nipple-grey-zz0352-plus-g","title":"Main Drain c\/w plug bush and nipple - Grey","description":"The choice of pool fittings can make or break the overall impression of a pool. To add that perfect finishing touch and extend the options available, Certikin offer the attractive Optimus range of flow fittings.\u003cbr\u003e\u003cbr\u003eSuitable for both liner and concrete pools, the Optimus range blends beautifully with darker pool finishes as it comes in an attractive metallic grey or black plastic.\u003cbr\u003e\u003cbr\u003eWith the popularity of salt chlorinators on the increase this new range offers the ideal solution for corrosion free flow fittings. Products include skimmers and extension throats, wall inlets, vacuum points and main drains with anti vortex grille.\u003ch4\u003eDownload Data Sheets\u003c\/h4\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Leaflet \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_072e1fbe-8428-4954-ba03-18da9588e9fb\/original\/certikinoptimusfittings-208904.pdf\" target=\"_blank\" class=\"underline\"\u003e Leaflet EN \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748396761434,"sku":"ZZ0352+G","price":146.76,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/ZZ0352_G_329940_ZZ0352_G_2.jpg?v=1753319856"},{"product_id":"main-drain-c-w-hydro-relief-valve-collection-tube-bush-and-nipple-white-plug-bush-and-nipple-grey-zz0353p-plus-g","title":"Main Drain c\/w hydro relief valve, collection tube, bush and nipple, White plug bush and nipple - Grey","description":"The choice of pool fittings can make or break the overall impression of a pool. To add that perfect finishing touch and extend the options available, Certikin offer the attractive Optimus range of flow fittings.\u003cbr\u003e\u003cbr\u003eSuitable for both liner and concrete pools, the Optimus range blends beautifully with darker pool finishes as it comes in an attractive metallic grey or black plastic.\u003cbr\u003e\u003cbr\u003eWith the popularity of salt chlorinators on the increase this new range offers the ideal solution for corrosion free flow fittings. Products include skimmers and extension throats, wall inlets, vacuum points and main drains with anti vortex grille.\u003ch4\u003eDownload Data Sheets\u003c\/h4\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Leaflet \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_072e1fbe-8428-4954-ba03-18da9588e9fb\/original\/certikinoptimusfittings-208904.pdf\" target=\"_blank\" class=\"underline\"\u003e Leaflet EN \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748396826970,"sku":"ZZ0353P+G","price":169.2,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/ZZ0353P_G_329943_ZZ0352_G_1.jpg?v=1753319858"},{"product_id":"6-main-drain-with-anti-vortex-black-hd33l-plus-b","title":"6\" Main Drain with Anti Vortex - Black","description":"There is a type of Certikin Main Drain (sump) available to suit every swimming pool. Main drains are used to draw the base water for filtering and are also used as the principle method of emptying the swimming pool.  The HD33 is suitable for both concrete and liner domestic pools and features Certikin's unique grille design.   On both concrete and liner models, the grille is fixed in place with stainless steel screws for added safety. \u003cbr\u003e\u003cbr\u003eWe also have commercial main drains with a variety of flow rates to choose from - commercial drains are available as frame and grille only or as a complete drain with a body. On commercial or shallow pool applications stainless steel main drain grilles must be used.  A reinforced grille is available for commercial drains intended for use in shallow pools - please contact us for details.\u003cbr\u003e\u003cbr\u003eWhen choosing sump size always assume that total flow may be directed to the plant room via the sump(s)  sump size should be chosen accordingly.  In normal conditions flow will be divided between surface draw-off and sump(s) in ratio: 70% Surface\/30% sump  Skimmer or 50% Surface\/50% sump  Deck Level.\u003cbr\u003e\u003cbr\u003eImportant - Main drains must be arranged so that there is no risk of bathers being drawn towards them or trapped there. It is recommended that on all installations, including domestic, a minimum of 2 x main drains are installed 2 metres apart.\u003ch4\u003eDownload Data Sheets\u003c\/h4\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Leaflet \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_072e1fbe-8428-4954-ba03-18da9588e9fb\/original\/certikinoptimusfittings-208904.pdf\" target=\"_blank\" class=\"underline\"\u003e Leaflet EN \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Installation manual \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_f9398af4-95dc-4b2d-95ee-6937e6f7cb9c\/original\/Certikin_maindrain_manual-73.pdf\" target=\"_blank\" class=\"underline\"\u003e Installation manual Main Drains EN FR IT + \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Technical Drawings \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_a10e27b8-2e92-40ef-8e02-be278b4b7e6d\/original\/HD33L.dwg\" target=\"_blank\" class=\"underline\"\u003e HD33L DWG File \u003c\/a\u003e \u003c\/li\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_5450f318-971a-4603-95f9-774ce451aa12\/original\/HD33L.pdf\" target=\"_blank\" class=\"underline\"\u003e HD33L Drawing \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748397875546,"sku":"HD33L+B","price":136.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/HD33L_B_309268_HD33C_B_main_drain_black_8.png?v=1753319861"},{"product_id":"main-drain-c-w-hydro-relief-valve-collection-tube-bush-and-nipple-white-plug-bush-and-nipple-black-zz0353p-plus-b","title":"Main Drain c\/w hydro relief valve, collection tube, bush and nipple, White plug bush and nipple - Black","description":"The choice of pool fittings can make or break the overall impression of a pool. To add that perfect finishing touch and extend the options available, Certikin offer the attractive Optimus range of flow fittings.\u003cbr\u003e\u003cbr\u003eSuitable for both liner and concrete pools, the Optimus range blends beautifully with darker pool finishes as it comes in an attractive metallic grey or black plastic.\u003cbr\u003e\u003cbr\u003eWith the popularity of salt chlorinators on the increase this new range offers the ideal solution for corrosion free flow fittings. Products include skimmers and extension throats, wall inlets, vacuum points and main drains with anti vortex grille.\u003ch4\u003eDownload Data Sheets\u003c\/h4\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Leaflet \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_072e1fbe-8428-4954-ba03-18da9588e9fb\/original\/certikinoptimusfittings-208904.pdf\" target=\"_blank\" class=\"underline\"\u003e Leaflet EN \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748398137690,"sku":"ZZ0353P+B","price":168.84,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/ZZ0353P_B_329824_ZZ0352_1.jpg?v=1753319864"},{"product_id":"6-main-drain-with-anti-vortex-medium-blue-hd33l-plus-mb","title":"6\" Main Drain with Anti Vortex - Medium Blue","description":"There is a type of Certikin Main Drain (sump) available to suit every swimming pool. Main drains are used to draw the base water for filtering and are also used as the principle method of emptying the swimming pool.  The HD33 is suitable for both concrete and liner domestic pools and features Certikin's unique grille design.   On both concrete and liner models, the grille is fixed in place with stainless steel screws for added safety. \u003cbr\u003e\u003cbr\u003eWe also have commercial main drains with a variety of flow rates to choose from - commercial drains are available as frame and grille only or as a complete drain with a body. On commercial or shallow pool applications stainless steel main drain grilles must be used.  A reinforced grille is available for commercial drains intended for use in shallow pools - please contact us for details.\u003cbr\u003e\u003cbr\u003eWhen choosing sump size always assume that total flow may be directed to the plant room via the sump(s)  sump size should be chosen accordingly.  In normal conditions flow will be divided between surface draw-off and sump(s) in ratio: 70% Surface\/30% sump  Skimmer or 50% Surface\/50% sump  Deck Level.\u003cbr\u003e\u003cbr\u003eImportant - Main drains must be arranged so that there is no risk of bathers being drawn towards them or trapped there. It is recommended that on all installations, including domestic, a minimum of 2 x main drains are installed 2 metres apart.\u003ch4\u003eDownload Data Sheets\u003c\/h4\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Technical Drawings \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_a10e27b8-2e92-40ef-8e02-be278b4b7e6d\/original\/HD33L.dwg\" target=\"_blank\" class=\"underline\"\u003e HD33L DWG File \u003c\/a\u003e \u003c\/li\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_5450f318-971a-4603-95f9-774ce451aa12\/original\/HD33L.pdf\" target=\"_blank\" class=\"underline\"\u003e HD33L Drawing \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748399186266,"sku":"HD33L+MB","price":136.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/HD33L_MB_309271_HD33_Mid_Blue_1.png?v=1753319867"},{"product_id":"main-drain-c-w-plug-bush-and-nipple-medium-blue-zz0352-plus-mb","title":"Main Drain c\/w plug bush and nipple - Medium Blue","description":"There is a type of Certikin Main Drain (sump) available to suit every swimming pool. Main drains are used to draw the base water for filtering and are also used as the principle method of emptying the swimming pool. The HD33 is suitable for both concrete and liner domestic pools and features Certikin's unique grille design. On both concrete and liner models, the grille is fixed in place with stainless steel screws for added safety. \u003cbr\u003e\u003cbr\u003eWe also have commercial main drains with a variety of flow rates to choose from - commercial drains are available as frame and grille only or as a complete drain with a body. On commercial or shallow pool applications stainless steel main drain grilles must be used. A reinforced grille is available for commercial drains intended for use in shallow pools - please contact us for details.\u003cbr\u003e\u003cbr\u003eWhen choosing sump size always assume that total flow may be directed to the plant room via the sump(s) sump size should be chosen accordingly. In normal conditions flow will be divided between surface draw-off and sump(s) in ratio: 70% Surface\/30% sump Skimmer or 50% Surface\/50% sump Deck Level.\u003cbr\u003e\u003cbr\u003eImportant - Main drains must be arranged so that there is no risk of bathers being drawn towards them or trapped there. It is recommended that on all installations, including domestic, a minimum of 2 x main drains are installed 2 metres apart.","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748399317338,"sku":"ZZ0352+MB","price":146.76,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/ZZ0352_MB_329944_ZZ0352_MB_1.jpg?v=1753319869"},{"product_id":"main-drain-c-w-hydro-relief-valve-collection-tube-bush-and-nipple-white-plug-bush-and-nipple-medium-blue-zz0353p-plus-mb","title":"Main Drain c\/w hydro relief valve, collection tube, bush and nipple, White plug bush and nipple - Medium Blue","description":"There is a type of Certikin Main Drain (sump) available to suit every swimming pool. Main drains are used to draw the base water for filtering and are also used as the principle method of emptying the swimming pool. The HD33 is suitable for both concrete and liner domestic pools and features Certikin's unique grille design. On both concrete and liner models, the grille is fixed in place with stainless steel screws for added safety. \u003cbr\u003e\u003cbr\u003eWe also have commercial main drains with a variety of flow rates to choose from - commercial drains are available as frame and grille only or as a complete drain with a body. On commercial or shallow pool applications stainless steel main drain grilles must be used. A reinforced grille is available for commercial drains intended for use in shallow pools - please contact us for details.\u003cbr\u003e\u003cbr\u003eWhen choosing sump size always assume that total flow may be directed to the plant room via the sump(s) sump size should be chosen accordingly. In normal conditions flow will be divided between surface draw-off and sump(s) in ratio: 70% Surface\/30% sump Skimmer or 50% Surface\/50% sump Deck Level.\u003cbr\u003e\u003cbr\u003eImportant - Main drains must be arranged so that there is no risk of bathers being drawn towards them or trapped there. It is recommended that on all installations, including domestic, a minimum of 2 x main drains are installed 2 metres apart.","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748399382874,"sku":"ZZ0353P+MB","price":168.84,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/ZZ0353P_MB_329945_ZZ0352_MB_1.jpg?v=1753319871"},{"product_id":"6-main-drain-with-anti-vortex-dark-blue-hd33l-plus-db","title":"6\" Main Drain with Anti Vortex - Dark Blue","description":"There is a type of Certikin Main Drain (sump) available to suit every swimming pool. Main drains are used to draw the base water for filtering and are also used as the principle method of emptying the swimming pool.  The HD33 is suitable for both concrete and liner domestic pools and features Certikin's unique grille design.   On both concrete and liner models, the grille is fixed in place with stainless steel screws for added safety. \u003cbr\u003e\u003cbr\u003eWe also have commercial main drains with a variety of flow rates to choose from - commercial drains are available as frame and grille only or as a complete drain with a body. On commercial or shallow pool applications stainless steel main drain grilles must be used.  A reinforced grille is available for commercial drains intended for use in shallow pools - please contact us for details.\u003cbr\u003e\u003cbr\u003eWhen choosing sump size always assume that total flow may be directed to the plant room via the sump(s)  sump size should be chosen accordingly.  In normal conditions flow will be divided between surface draw-off and sump(s) in ratio: 70% Surface\/30% sump  Skimmer or 50% Surface\/50% sump  Deck Level.\u003cbr\u003e\u003cbr\u003eImportant - Main drains must be arranged so that there is no risk of bathers being drawn towards them or trapped there. It is recommended that on all installations, including domestic, a minimum of 2 x main drains are installed 2 metres apart.\u003ch4\u003eDownload Data Sheets\u003c\/h4\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Technical Drawings \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_a10e27b8-2e92-40ef-8e02-be278b4b7e6d\/original\/HD33L.dwg\" target=\"_blank\" class=\"underline\"\u003e HD33L DWG File \u003c\/a\u003e \u003c\/li\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_5450f318-971a-4603-95f9-774ce451aa12\/original\/HD33L.pdf\" target=\"_blank\" class=\"underline\"\u003e HD33L Drawing \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748400791898,"sku":"HD33L+DB","price":136.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/HD33L_DB_309270_HD33_Dark_Blue_1.png?v=1753319874"},{"product_id":"main-drain-c-w-plug-bush-and-nipple-dark-blue-zz0352-plus-db","title":"Main Drain c\/w plug bush and nipple - Dark Blue","description":"There is a type of Certikin Main Drain (sump) available to suit every swimming pool. Main drains are used to draw the base water for filtering and are also used as the principle method of emptying the swimming pool. The HD33 is suitable for both concrete and liner domestic pools and features Certikin's unique grille design. On both concrete and liner models, the grille is fixed in place with stainless steel screws for added safety. \u003cbr\u003e\u003cbr\u003eWe also have commercial main drains with a variety of flow rates to choose from - commercial drains are available as frame and grille only or as a complete drain with a body. On commercial or shallow pool applications stainless steel main drain grilles must be used. A reinforced grille is available for commercial drains intended for use in shallow pools - please contact us for details.\u003cbr\u003e\u003cbr\u003eWhen choosing sump size always assume that total flow may be directed to the plant room via the sump(s) sump size should be chosen accordingly. In normal conditions flow will be divided between surface draw-off and sump(s) in ratio: 70% Surface\/30% sump Skimmer or 50% Surface\/50% sump Deck Level.\u003cbr\u003e\u003cbr\u003eImportant - Main drains must be arranged so that there is no risk of bathers being drawn towards them or trapped there. It is recommended that on all installations, including domestic, a minimum of 2 x main drains are installed 2 metres apart.","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748400857434,"sku":"ZZ0352+DB","price":146.76,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/ZZ0352_DB_329946_ZZ0352_DB_2.jpg?v=1753319876"},{"product_id":"main-drain-c-w-hydro-relief-valve-collection-tube-bush-and-nipple-white-plug-bush-and-nipple-dark-blue-zz0353p-plus-db","title":"Main Drain c\/w hydro relief valve, collection tube, bush and nipple, White plug bush and nipple - Dark Blue","description":"There is a type of Certikin Main Drain (sump) available to suit every swimming pool. Main drains are used to draw the base water for filtering and are also used as the principle method of emptying the swimming pool. The HD33 is suitable for both concrete and liner domestic pools and features Certikin's unique grille design. On both concrete and liner models, the grille is fixed in place with stainless steel screws for added safety. \u003cbr\u003e\u003cbr\u003eWe also have commercial main drains with a variety of flow rates to choose from - commercial drains are available as frame and grille only or as a complete drain with a body. On commercial or shallow pool applications stainless steel main drain grilles must be used. A reinforced grille is available for commercial drains intended for use in shallow pools - please contact us for details.\u003cbr\u003e\u003cbr\u003eWhen choosing sump size always assume that total flow may be directed to the plant room via the sump(s) sump size should be chosen accordingly. In normal conditions flow will be divided between surface draw-off and sump(s) in ratio: 70% Surface\/30% sump Skimmer or 50% Surface\/50% sump Deck Level.\u003cbr\u003e\u003cbr\u003eImportant - Main drains must be arranged so that there is no risk of bathers being drawn towards them or trapped there. It is recommended that on all installations, including domestic, a minimum of 2 x main drains are installed 2 metres apart.","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748400890202,"sku":"ZZ0353P+DB","price":168.84,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/ZZ0353P_DB_329947_ZZ0352_DB_2.jpg?v=1753319878"},{"product_id":"main-drain-c-w-flat-grille-white-hd33ld","title":"Main Drain c\/w flat Grille - White","description":"There is a type of Certikin Main Drain (sump) available to suit every swimming pool. Main drains are used to draw the base water for filtering and are also used as the principle method of emptying the swimming pool.  The HD33 is suitable for both concrete and liner domestic pools and features Certikin's unique grille design.   On both concrete and liner models, the grille is fixed in place with stainless steel screws for added safety. \u003cbr\u003e\u003cbr\u003eWe also have commercial main drains with a variety of flow rates to choose from - commercial drains are available as frame and grille only or as a complete drain with a body. On commercial or shallow pool applications stainless steel main drain grilles must be used.  A reinforced grille is available for commercial drains intended for use in shallow pools - please contact us for details.\u003cbr\u003e\u003cbr\u003eWhen choosing sump size always assume that total flow may be directed to the plant room via the sump(s)  sump size should be chosen accordingly.  In normal conditions flow will be divided between surface draw-off and sump(s) in ratio: 70% Surface\/30% sump  Skimmer or 50% Surface\/50% sump  Deck Level.\u003cbr\u003e\u003cbr\u003eImportant - Main drains must be arranged so that there is no risk of bathers being drawn towards them or trapped there. It is recommended that on all installations, including domestic, a minimum of 2 x main drains are installed 2 metres apart.\u003ch4\u003eDownload Data Sheets\u003c\/h4\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Technical Drawings \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_54786f28-3bd3-4960-9aad-fe726857ef99\/original\/HD33LD.dwg\" target=\"_blank\" class=\"underline\"\u003e HD33LD DWG File \u003c\/a\u003e \u003c\/li\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_4db18fba-0961-4455-b58f-4046dc172692\/original\/HD33LD.pdf\" target=\"_blank\" class=\"underline\"\u003e HD33LD Drawing \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748401021274,"sku":"HD33LD","price":75.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/HD33LD_251395_hd33ld_211502_7.png?v=1753319881"},{"product_id":"stainless-steel-main-drain-grille-c-w-screws-and-flange-white-ck33s","title":"Stainless steel main drain grille c\/w screws and flange - White","description":"\u003ch4\u003eDownload Data Sheets\u003c\/h4\u003e \u003cdiv class=\"product__attachments-container w-100 mt-3\"\u003e \u003cp\u003e Technical Drawings \u003c\/p\u003e \u003cul class=\"product__attachments list-md-2-columns\"\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_a7577d3c-9527-41c9-875f-feecf17a1508\/original\/CK33S.dwg\" target=\"_blank\" class=\"underline\"\u003e CK33S DWG File \u003c\/a\u003e \u003c\/li\u003e \u003cli class=\"product__attachments-item\"\u003e \u003ca href=\"https:\/\/asset.productmarketingcloud.com\/api\/assetstorage\/3096_d607b90b-a081-487a-8170-ff06424547de\/original\/CK33S.pdf\" target=\"_blank\" class=\"underline\"\u003e CK33S Drawing \u003c\/a\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748402004314,"sku":"CK33S","price":85.68,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/CK33S_234245_ck33s_4248_2.jpg?v=1753319883"},{"product_id":"flat-main-drain-grille-stainless-steel-c-w-flange-gasket-and-screws-sublime-sphd33lo-plus-sub","title":"Flat Main Drain Grille (Stainless Steel) c\/w flange gasket and screws - Sublime","description":"\u003cp\u003eCertikin 6\" Main Drain Grille in Sublime perfect to colour match with your Certikin liner\u003c\/p\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748402102618,"sku":"SPHD33LO+SUB","price":144.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/SPHD33LO_SUB_309274_CK33S_Sublime_1.png?v=1753319886"},{"product_id":"flat-main-drain-grille-stainless-steel-c-w-flange-gasket-and-screws-marble-sphd33lo-plus-marb","title":"Flat Main Drain Grille (Stainless Steel) c\/w flange gasket and screws - Marble","description":"\u003cp\u003eCertikin 6\" Main Drain Grille in Blue Marble perfect to colour match with your Certikin liner\u003c\/p\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748402397530,"sku":"SPHD33LO+MARB","price":144.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/SPHD33LO_MARB_309272_CK33S_Marble_1.png?v=1753319889"},{"product_id":"1-5-hydro-relief-valve-brass-ck34s","title":"1.5\" hydro relief valve - Brass","description":"\u003cp\u003eThis hydrostatic relief valve helps to avoid possible damage to an empty pool if the water table rises above the level of the floor.\u003c\/p\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748403675482,"sku":"CK34S","price":117.6,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/CK34S_234248_ck34s_199684_1.png?v=1753319892"},{"product_id":"1-5-hydro-relief-valve-abs-hd34","title":"1.5\" hydro relief valve - ABS","description":"\u003cp\u003eThis hydrostatic relief valve helps to avoid possible damage to an empty pool if the water table rises above the level of the floor.\u003c\/p\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748403741018,"sku":"HD34","price":22.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/HD34_234247_hd34_199682_4.png?v=1753319894"},{"product_id":"1-5-collection-tube-abs-hd35","title":"1.5\" collection tube - ABS","description":"\u003cp\u003eWorks in conjunction with the hydrostatic relief valve to collect water from the underside of the pool floor.\u003c\/p\u003e","brand":"Certikin","offers":[{"title":"Default Title","offer_id":51748403806554,"sku":"HD35","price":14.16,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/HD35_234246_hd35_199680_1.png?v=1753319896"},{"product_id":"certikin-1-5-plastic-collection-tube-hd35-1218046015","title":"Certikin 1.5\" Plastic Collection Tube - HD35","description":"\u003ch2\u003eAdditional information\u003c\/h2\u003e\n\n\u003ctable class=\"woocommerce-product-attributes shop_attributes\"\u003e\n \u003ctbody\u003e\n\u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--gc-weight\"\u003e\n \u003cth class=\"woocommerce-product-attributes-item__label\"\u003eWeight\u003c\/th\u003e\n \u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e\u003cp\u003e0.1 Kilograms\u003c\/p\u003e\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--gc-length\"\u003e\n \u003cth class=\"woocommerce-product-attributes-item__label\"\u003eLength\u003c\/th\u003e\n \u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e\u003cp\u003e0.05 Meters\u003c\/p\u003e\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--gc-width\"\u003e\n \u003cth class=\"woocommerce-product-attributes-item__label\"\u003eWidth\u003c\/th\u003e\n \u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e\u003cp\u003e0.25 Meters\u003c\/p\u003e\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--gc-height\"\u003e\n \u003cth class=\"woocommerce-product-attributes-item__label\"\u003eHeight\u003c\/th\u003e\n \u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e\u003cp\u003e0.07 Meters\u003c\/p\u003e\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--gc-volume\"\u003e\n \u003cth class=\"woocommerce-product-attributes-item__label\"\u003eVolume\u003c\/th\u003e\n \u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e\u003cp\u003e0.001 CubicMeters\u003c\/p\u003e\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Golden Coast","offers":[{"title":"Default Title","offer_id":51838299210074,"sku":"1218046015","price":14.16,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/1218046015_1.jpg?v=1755253209"},{"product_id":"certikin-1-5-plastic-hydro-relief-valve-hd34-1218044215","title":"Certikin 1.5\" Plastic Hydro Relief Valve - HD34","description":"\u003ch2\u003eAdditional information\u003c\/h2\u003e\n\n\u003ctable class=\"woocommerce-product-attributes shop_attributes\"\u003e\n \u003ctbody\u003e\n\u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--gc-weight\"\u003e\n \u003cth class=\"woocommerce-product-attributes-item__label\"\u003eWeight\u003c\/th\u003e\n \u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e\u003cp\u003e0.05 Kilograms\u003c\/p\u003e\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--gc-length\"\u003e\n \u003cth class=\"woocommerce-product-attributes-item__label\"\u003eLength\u003c\/th\u003e\n \u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e\u003cp\u003e0.05 Meters\u003c\/p\u003e\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--gc-width\"\u003e\n \u003cth class=\"woocommerce-product-attributes-item__label\"\u003eWidth\u003c\/th\u003e\n \u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e\u003cp\u003e0.15 Meters\u003c\/p\u003e\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--gc-height\"\u003e\n \u003cth class=\"woocommerce-product-attributes-item__label\"\u003eHeight\u003c\/th\u003e\n \u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e\u003cp\u003e0.1 Meters\u003c\/p\u003e\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--gc-volume\"\u003e\n \u003cth class=\"woocommerce-product-attributes-item__label\"\u003eVolume\u003c\/th\u003e\n \u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e\u003cp\u003e0.001 CubicMeters\u003c\/p\u003e\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Golden Coast","offers":[{"title":"Default Title","offer_id":51838299242842,"sku":"1218044215","price":22.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/1218044215_1.jpg?v=1755253209"},{"product_id":"certikin-6-grey-metallic-concrete-main-drain-with-2-side-and-1-5-bottom-outlets-hd33cg-1118040460","title":"Certikin 6\" Grey Metallic Concrete Main Drain with 2\" Side and 1.5\" Bottom Outlets - HD33CG","description":"\u003cp\u003eMain drains come complete with an anti-vortex grille.\u003cbr\u003e\nFor commercial and shallow pools a stainless steel grille must be used.\u003cbr\u003e\nMaximum flow rate is 9.5?m³\/hr for 2? pipe.\u003c\/p\u003e\u003ch2\u003eAdditional information\u003c\/h2\u003e\n\n\u003ctable class=\"woocommerce-product-attributes shop_attributes\"\u003e\n \u003ctbody\u003e\n\u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--gc-weight\"\u003e\n \u003cth class=\"woocommerce-product-attributes-item__label\"\u003eWeight\u003c\/th\u003e\n \u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e\u003cp\u003e0.9 Kilograms\u003c\/p\u003e\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--gc-length\"\u003e\n \u003cth class=\"woocommerce-product-attributes-item__label\"\u003eLength\u003c\/th\u003e\n \u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e\u003cp\u003e0.2 Meters\u003c\/p\u003e\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--gc-width\"\u003e\n \u003cth class=\"woocommerce-product-attributes-item__label\"\u003eWidth\u003c\/th\u003e\n \u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e\u003cp\u003e0.29 Meters\u003c\/p\u003e\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--gc-height\"\u003e\n \u003cth class=\"woocommerce-product-attributes-item__label\"\u003eHeight\u003c\/th\u003e\n \u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e\u003cp\u003e0.29 Meters\u003c\/p\u003e\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--gc-volume\"\u003e\n \u003cth class=\"woocommerce-product-attributes-item__label\"\u003eVolume\u003c\/th\u003e\n \u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e\u003cp\u003e0.017 CubicMeters\u003c\/p\u003e\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Golden Coast","offers":[{"title":"Default Title","offer_id":51838302290266,"sku":"1118040460","price":105.24,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/8423\/8426\/files\/1118040460_1.jpg?v=1755253196"},{"product_id":"certikin-6-black-concrete-main-drain-with-2-side-and-1-5-bottom-outlets-hd33cb-1118040360","title":"Certikin 6\" Black Concrete Main Drain with 2\" Side and 1.5\" Bottom Outlets - 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