I am a very new pool owner and trying to learn as much as possible. We bought a house with an in ground, SWG pool, already installed approximately 2 years ago.
I feel like I have a fairly good understanding of the mechanics of the equipment but I have a problem now that is worrying me somewhat.
I went back to look at the pump yesterday evening and noticed that on low speed (I have a variable speed, Hayward NorthStar 2hp pump) the basket was half full of air, water was just below the intake line. Water was entering the basket area at a good rate, but it was not filling the pot.
If I turn it on high, after a few minutes of running, the pot will fill up, I can bleed air out of the top of the filter and it will slowly fill to 100% with a lot of small bubbles...kind of like cavitation bubbles. If I turn it back to low, there is about a 2" diameter bubble that increases in size. In about 20 minutes, the water will be back below the intake line.
If I turn it on high and let it fill up, then turn it off, air will bubble into the pot until it appears like it is almost emptying. If I turn the Jandy valve on the intake side to just skimmer/vacuum the bubbles get smaller but faster, if I turn it to drain the bubbles get larger and slower. If I turn off the jandy, bubbles stop and water level holds in the pot. I noticed this morning, I turn it off and left it open to both skimmer and drain and no bubbles. I went and moved the lever while it was off, and heard what sounded like an air release or hiss and bubbles started again. Moving it back and forth just slowed or sped up the bubbles. Turn it to off, and it stops bubbles.
Is this normal behavior? To me, it sounds like I have an air leak somewhere into the intake side...not sure where to start though. It wasnt doing this 24hrs ago, this seemed to just start last night. We bought the house with a warranty that includes the pool equipment, so I called them out for a 75$ service fee. I just want to know what I am talking about when the tech comes out.