After cleaning my Pentair, I'm having an issue that I hope someone can diagnose. I suspect an air leak, but not sure.
Recharged filter and everything seems to be working ok. The next morning, I noticed DE in my pump basket and my filter pressure was at ZERO. The pump primed and the filter pressure came up normally a few seconds later. Shut pump off, waited a few hours, and it did it again. DE in the basket, ZERO filter pressure.....only to go back to normal pressure seconds later.
Took it apart again. Was surprised but the entire filter was full of water still.....not sure how I screwed that up? When I removed the filter grids/manifold, I noticed the standpipe o ring was askew.
So, a leak, right?
1. Could a bad standpipe o ring cause the symptoms I described above?
2. If not, I guess I'm not using enough lube on the filter o ring?