Certikin Main Drain HD33D – Concrete Pools

RRP: £54.00


Certikin Main Drain HD33D in white, designed for concrete pools and comes with flat grille as standard.


This Certikin main drain HD33D in white comes with a flat low-velocity grille in matching white.

Featuring Certikin’s unique grille design and available for concrete or liner pools the HD33 drain is used to draw the base water for filtering and is also used as the principal method of emptying the pool. Both concrete and liner types come complete with self-tapping fixings screws for added safety. Manufactured in white ABS.

This model is for concrete pools if you’re looking for a liner pool option please see the HD33LD main drain for liner pools.


  • High flow, low velocity grille supplied as standard
    Provides up to 50% more free-flow area than other models
  • Protective film prevents damage during installation


Certikin Main Drain HD33D Concrete Pools Dimensions | Blue Cube Direct

Main Drain Selection:

When choosing sump (main drain) 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 for skimmer-type pools or 50% Surface/50% sump for deck-level pools.

On commercial or shallow pool applications stainless steel main drain grilles must be used. 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.

Additional information

Weight 1 kg







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