Main drain c/w hydro relief valve, collection tube, bush and nipple, White plug bush and nipple - White

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. >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.
When 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.
Important - 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.