Cartridge Filter Leaking on Startup

[abrink]

Upon pump start up, my cartridge filter leaks for about 10 seconds then completely stops. I've used a health amount of magic lube on the O ring, and that seems to help a little. Not sure if this is normal or not (I suspect that it is not.)

Is it time just for a new O ring?

 

[frustratedpoolmom]

Does the O ring appear to have stretched? If so then yes, probably replace it.

 

[abrink]

Its pretty snug, takes some effort it get it back on. I'll try replacing it and see what happens