Bless the internet; I do a google search and find a bunch of folks who address my precise problem! Hayward Perflex DE filter EC50 leaking from lid area
I bought a house this Summer with an 18' 5,000 gal AGP. The old owner has been super-helpful in instructing me on the ins-and-outs, although I do not test the water as frequently as I should. I was having the problem of cleaning the filter and having fantastic flow, but then the flow receding within a few days, and needing to clean it weekly. I spoke to the local pool supply place-guy and he said I probably needed to take the filter apart and really clean it out, which I did last weekend, again with the old owner's help. I got the tentacles reasonably white and we put it back together and the flow was tremendous--but a couple days later I noticed a drip, which turned into a steady trickle.
I tool the filter apart again yesterday, and applied lube to the O-ring, but I put on a fairly thin layer, and then put it back together, and by last night the trickle was back. The pool supply store suggests replacing the gasket, which I guess means taking the physical lid apart to some extent. I'm a little confused about the tightening of the nut--it's a single nut fastening the band, with a spring. The old owner did not have the coils of the spring touching, but the illustration on the side of the filter does say they should touch. I tightened it to where they were touching, but the leaking persisted. The pool supply guy says the gasket may be pinched if it is over-tightened, so there seems to be two schools of though running counter to each other on this question.
My question: should I take it apart and really slather the lube into the gasket groove where the lids sits and twist it down real good and hope for a different result this time? The old owner never used lube, never tightened the nut to where the spring coils touched. And could the increased flow be part of the problem? I know the old owner put a stronger pump than standard on the system, and the flow is coming out so strong since the cleaning this weekend that it could be the force just exceeds what the filter can hold without a slight leak. And--is a leak like this dangerous to the system?
Thank you for your time and guidance. The Hayward filter is the EC50AC, if that makes any different in the diagnostics.