Dripping water filter after replacing cartridge

[Rman]

I have a Big Blue model 10 installed before water softener with pentek sediment cartridge. I need to change out the cartridge monthly because of sediment very fine after New well drilled 1 yr ago water tested great.
When I replace the cartridge the first time I install it leaks. I then unscrew the canister and flip the O ring and most times it works
So I bought new O rings on line and same problem occurred with dripping?? Yes I do lube up the o rings with silicone grease for water filters. I’ve now also wipe thoroughly the inside of the filter cap. Cheap o rings or am I stuck replacing the whole assembly?
Real pita with bypass valves. Thanks

 

[Reach4]

I’ve now also wipe thoroughly the inside of the filter cap. Cheap o rings or am I stuck replacing the whole assembly?

Your filter housing may not have been the Pentek Big Blue.

Wipe the inside of the filter cap??? Wipe what? Not silicone grease. Only the o-ring gets a light coat of silicone grease.

You may indeed have the wrong o-ring.

Supposedly you should just tighten by hand, and use the wrench to loosen. But maybe you need to snug a bit with the wrench.

 

[Sponsor]

 

[Plumber69]

A small imperfection in the ring will cause it to leak