Description
Main Drain For Concrete Pools
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.
Features:
- 6″ Main Drain with Anti Vortex Grille
- Product Code HD33
- High flow – low velocity grille supplied as standard – Provides up to 50% more free flow area than other models
- Anti-vortex design – protective film prevents damage during installation
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.
HD33 – Main Drain
Current regulations state that every pool must have at least two main drains. Therefore, at least one main drain on every pool will need the bottom port sealed off – the Certikin main drain body has a knock-out blanking plate in the bottom port to save you time and money on site.
Main Drains
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 entrapped. Regulations state that on all installations a minimum of 2 x main drains must be installed 2 metres apart.
