When I turn the pool on after it has been sitting for a few hours, I get a big burp in the returns. There is also air in the filter b/c I can open the pressure valve at the top of the pump and hear the air rushing out until the water replaces it b/c the pump is running. I've looked everywhere and don't see any leaks. Thoughts? How can I de-bug? I've already opened/closed the filter to make sure it was seated correctly.


22k gallon IG, DE filter, SWG.

Thanks