Mystery big bubbles


Gold Supporter
Silver Supporter
In The Industry
Aug 14, 2018

Ocassionally on my friends pool large air bubbles come from one of the returns. It's a newer 10k pool with 100 sq ft single catridge filter and a Hayward VS pump. The weir door is not sticking on the skimmer and the pump doesn't appear to be losing prime. It happens rarely and only for a short time.

I service another pool where it happens with the single bubbler on the shelf. The fountain goes high and then drops off. I would be interested in getting some thoughts on what it could be before we call out a repair company.


Gold Supporter
LifeTime Supporter
TFP Guide
Jul 3, 2013
Fletcher, OK
sounds like maybe a small leak in the pressure side unless there is air in the pump basket then the suction side.... Mine will get some air in the filter on lower speed 800 rpm and then when it speeds up to 1300 rpm some bubbles will come out of the filter..


Mod Squad
TFP Expert
LifeTime Supporter
Jul 7, 2014
Bedford, TX

I suspect that the water in the pump basket leaks back into the pool at night, When you turn on the pump it initially pushes a large amount of air through the system.


Jim R.
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