I have a 36 sq ft DE filter, 1.5 HP pump, and in-ground pool. I cleaned the filter basket at the pump, and the water drained out of it, as expected. I put a hose into the basket to fill it up and help the pump regain its prime. When I turn the pump on, the water pumps into the filter basket, fills up after about 30 seconds or so, but then as soon as it's filled it loses its prime again and all the water just "whooshes" out of it. There were no air bubbles in the filter basket during the time it was filled up, which is only for a couple seconds. I bled the filter of air, and then shut off the release valve when water started coming out. I've tried this 3 or 4 times, and it keeps doing the same thing. Fills up, looks good, and then all the water suddenly gets sucked out.
A little background...I just bought the house a few weeks ago and I'm a first time pool owner. The pump / filter was running fine up until I opened the filter basket to clean it. So I don't expect there are any leaks anywhere, although I guess it's a possibility. I just think I've done something wrong somewhere.
Here's a photo of my set-up:
http://i1174.photobucket.com/albums/r61 ... photo1.jpg