This Certikin Main drain HD33LD 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 liner pools, if you’re looking for a liner pool option please see the HD33D main drain for concrete pools.

Features:

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

Dimensions:

Certikin Main Drain HD33LD Liner 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.

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HD33LD

Certikin Main drain HD33LD – Liner Pools