DE fliter leak

[ydave77]

Hello,

I have a DE filter that is running at 20psi, and seems to work fine when the pool pump is on, but when the pool pump goes off, water streams (not trickles) out of the top the DE filter. Any idea what is causing it? Appreciate any help you can give me...thanks!

 

[mas985]

You have a leak in an o-ring. It may seal fine when the pump is on and the pressure is higher but loosen up when the pump is off. Is there a fitting where it is leaking (e.g. air release, pressure gauge, valve, etc)?