Return Height

by Tom
(Sydney, Australia)

I have an above ground pool. The pump is 2.5hp and has a powerful jet stream, so powerful that it can move my solar blanket. The return creates a whirlpool that makes a loud terrible gurgling sound every couple of minutes. I think the return is to close to the water line. When the pool is full (to the top of the skimmer box) the return is 7cm from the water line. I have tried and put a different type of return ending on L shaped. That forces the water downward, but this has not stopped the problem, and it has doubled the pressure on the filter gauge. How far down below the water line should the return be and any suggestions will be welcome. Thx Tom



Hi Tom. A return should normally be several inches below water level. Ideally, it should be angled so that the flow of water reaches the service several feet away from the skimmer. It should point away from the skimmer and create a current around the pool. In theory, that will force all of the debris back around to the skimmer with just enough force that it will enter the skimmer.

Above ground pools are designed for smaller filter systems than what you have. A 1/2 or 3/4 hp pump is ideal for a one return system. A stronger system requires an additional return opening. I know 1 hp and 1.5 hp systems operate most effectively with two returns I am guessing a 2.5 might be better off with three.

Hayward makes a return that is ideal for above ground pools. You would simply need to lower your water level, pull the liner back, cut a hole or two in your wall and reset the liner. The hole is best cut with a hole saw. Hayward fittings are compatible with 1 1/2" PVC plumbing so connecting your returns together should not be a problem.

A 2.5hp pump with three returns should keep your pool sparkling clean all of the time.