Captain O-Ring - Replacement 151122 O-Rings Compatible with Pentair Pentek Big Blue Water Filters OEM Size ORing Buna-N (3 Pack)

These o-rings fit the Pentair Big Blue filter much better than other brands I have bought. Other brands had a diameter slightly too big for the o-ring channel in the filter sump, making it difficult to seat them in the channel, which required multiple attempts to reattach the sump to the top of the filter to get the assembly leaktight. These o-rings were just right. They seated totally within and against the outside wall of the filter sump o-ring channel, so when the sump was reattached to the top the filter it was leaktight on the first try.

No issues.

Fits my American Plumber filter housing perfectly, no leaks so far even though it may be just a bit thinner in diameter. I just installed it so I can't give it 5 stars until I know how the longevity is. This was tough to find locally so I'm glad to have found these. Most o rings of this size are $9 in retail stores so for a few dollars more you get 3 in the package making them a good value.

Received the O Rings quickly and they fit my Big Blue filter perfectly. Now I have 2 additional O Rings in case I need them for future filter changes. Thanks for a smooth transaction.

Worked fine on my Pentair Big Blue filter housing. No leaks Used silicone grease before installing.

Good product As advertised

O-ring worked really well in my water filter system. Size was exactly like the Pentair ring I removed. Easy to install & sealed well. Price was good. Not much else I can state concerning the ring.

O-rings fit just fine. They seem a little smaller in diameter than my old ones which likely have swollen and certainly stretched. Be sure to use Silicon grease to help them stay in place while you reassemble, it will also make it easier to remove later on.

Good fitment. Seems to be good quality rubber. No leaks!

Muy buen producto, hecho con buenos materiales y también buenos terminados

Excellent fit. Cured water leakage problem.

Don’t believe the AI overview or negative comments. These are the real deal. I just tried one of the three o Rings last night and it fits literally perfect. These guys should have made the OEM O rings because my original one was stretched out and this replacement one was perfect. I have the Big Blue Pentek OPAQUE 10 x 4.5 inch system. It sat perfectly in the borders of the cylinder and I was able to secure it with minimal lubricant grease my first attempt refastenig the cynlinder. Could not be happier with these O rings please don’t hesitate it’s totally worth the 15 dollars to not struggle with a heavy filter system.

Finally I can replace my old one and it fits very well.