OK so, I recently backwashed/rinsed for 2min, unitl sight glass was clear...and now I'm noticing that while the filter is set to filter...the sight glass is only half full...I believe it used to be full when filtering in the past...I also noticed that when the pump kicks in the top of the filter seems to bulge upward about 1/4 inch...pressurized I guess? Just checking to see if this is normal? Thanks
Anyone else with a hayward sand filter have the same symptoms?
Anyone else with a hayward sand filter have the same symptoms?