Problem removing strainer cover

I have an older Hayward pool pump and I have a problem removing the strainer cover. Even with the pump off, there appears to be so much pressure coming from somewhere, that the strainer cover is literally "sucked" on so tightly that I cannot turn it. When I am finally able to get the strainer cover off, the o-ring has been stretched so much that is unusable. The lid can only be put on one way -- turning it around until it slides into the plastic "rim" that holds it in place My problem is that when I try to turn the lid to get it back off, it is stuck to the pump housing and will not turn. I use a silicone based lube on the o-ring. What would be preventing the strainer cover from turning for removal? Could this be caused by the top of the pump housing--the area where the strainer cover slips into place--be too smooth or too rough? Would opening the pump drain that the basket sits in release pressure enough to allow the strainer cover to open?

I have contacted Hayward requesting help and have received none so far. I can't use my pool until I am able to remove and clean the strainer basket.

I am having the same trouble. It usually takes me (trying to turn the cover) and my dad (using a hammer) to get it off. When I replace the cover it goes on easily. Any suggestions?

you might try a bit of the silicone lube on the cover surface where it contacts the pump rim that holds it in place. Won't hurt to try.

I use the lube, but after it's back on for just a few minutes it's almost impossible to remove again. Once I get it off, it goes back on easily. I even tried closing off the water and letting some of the water out. Nothing seems to work. I busted one using the hammer. Very frustrating.

If you haven't tried this already, try breaking the suction by allowing air into your system, perhaps by opening up your automatic chlorinator, if you have one, or opening up the air valve on your filter. That should make the cover easier to remove.

Tom

Happens with mine as well; also hayward. I found that if I "break" the seal while the pump is running, then turn off the pump it comes off much more easily. That's probably risky business, though. The printing on the cover suggests using a piece of wood (2x4 I guess) in between the two ridges to break it loose. It also warns against over tightening. I've found it leaks air in if I tighten it less, though.