Why does my pool need a main drain?

The MAIN DRAIN is an extremely important part of any technically correct pool design.  

It is a must-have although fibreglass pools rarely have them - this is because they would weaken the  strength of the very thin fibreglass walls and floor, and it makes it cheaper to construct. A main drain is the typical suction point when emptying a pool. Without one, draining a pool below the skimmer waterline would be tedious and require a submersible pump.

Main drains are usually located on the lowest point in the pool, so the entire pool surface slants toward them. Most of the dirt and debris that sinks exits the pool through these drains.

SAFETY

In shallow pools less than about 1.40m deep, pools that have a lot of bathers - especially children, and commercial pools, it is highly recommended to install two drains, connected together but at least 50cm or more apart. This avoids a person being sucked down onto the grating by the pump suction.

Regularly inspect all drain covers for cracks, damage and advanced weathering. Drain covers and grates deteriorate over time due to exposure to sunlight and pool chemicals. Some regulations require that drain covers and grates must be replaced within seven (7) years from installation (or earlier if the cover or grate becomes damaged in any way). If a drain cover becomes loose, cracked, damaged, broken or is missing, close the pool or spa immediately, until an appropriate VGB 2008 certified drain cover is properly installed. Some covers or grates are not compatible with other manufacturers' frames and the existing frame must be removed and replaced. Only use the supplied stainless-steel or nylon screws. Substituted normal screws must not be used as they will rust very quickly and become loose.

If you are in any doubt whatsoever, please ask us for a compatibility check before ordering a maindrain or replacement grates.

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