Filter leaking

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David Rodecker

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Greetings, I have a two stage house filter system that was inherited with the home. This is my second time replacing the filters with iSpring F4WGB22B (Sediment & Carbon block).

After performing the replacement and refastening, the second filter (carbon) leaks! In removing it, I noticed that this second filter does NOT have an o-ring. (unless I completely lost it in the removal).

I obtained an o-ring (Pentair Water 151122) which fit around the second lip of the filter casing joint.

I've applied some silicon grease. It lasted for about 3 minutes, then started profusely leaking.

I've attempted a second seal, this time with a good amount of silicon grease. Still leaking.

Doesn't appear to be any physical damage, crack or otherwise. Any suggestions?
 

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Valveman

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The grease is just to make the o-ring slick so you can tighten the canister. No amount of grease is going to help with leaking. The o-ring needs to be a perfect fit.
 

Reach4

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I don't see threads on your pictures. I am suspecting that a big blue nut slides up the sumps, and draws the cartridge up.

https://terrylove.com/forums/index.php?threads/question-about-well-filter.58376/ #6 says that the common o-ring that you bought is thinner than what the iSpring housings use.

I think the Pentek 151122 O-Ring for 10" & 20" Big Blue is around
Actual Size (in) 5 1/2 inches (inside diameter) x 5 3/4 inches (outside diameter) x 3/16 inches (width)
Actual Size ( cm) 13.97 x 14.605 x 0.47625

Maybe a 357 or 429 size would work with the iSpring. https://www.marcorubber.com/o-ring-size-chart-as568.htm

Hmm.. Granger seems to show different dimensions for a 357.

https://www.grainger.com/category/h...s/o-rings?attrs=Dash+Number|429&filters=attrs
 
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David Rodecker

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Thank you Reach4 & valvleman. I bought the recommended o-ring which perhaps fit a bit better. Nevertheless after tightening, it still profusely leaks!

I'm beginning to think that there is something obstructing the cylinder from compressing down. There isn't anything evident, nevertheless I'm stumped.

Attached are some photos. Any ideas?
 

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