i recently had a new Hayward EcoStar pump installed for my underground pool (actually 2, first one was bad). Pump appears to be working correctly, but I get air in the strainer basket. I've tried various speeds up to what is recommended by Hayward and no change (to take restricted flow from the suction piping out of the equation). The air bubble continues to grow. Pool Service company came out and pressure tested the suction lines and piping, and we were not losing any pressure. They strongly believe that if I had installed a 3/4 hp normal pump I'd have no air and no issues (due to fan speed being 3450 rpm full time).

I also called Haywards technical support. They said that there should be no air in the strainer chamber once optimal flow is determined, but I tried all speeds available including 3450rpm which trips my 20amp / 220 breaker, and didn't notice any real difference (water is moving quicker, but air is still entering pump strainer basket).

Any thoughts on what to try next? I bleed off quite a bit of air from the filter at least once per day, all strainers are clean, and I cleaned out the filter.

Pool is 27.5k gals with 2" suction and return lines coming and going from pool equipment (they both split further into 1 1/2" lines for the skimmers and returns. The junction for the suction piping is a new jandy flow control valve. Starite Cartridge filter, and Starite 400k heater.

Joe


Joe