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💧 Seal in purity, seal out leaks — upgrade your water filter game!
Captain O-Ring Replacement 151122 O-Rings (3 Pack) are precision-engineered seals compatible with Pentair Pentek Big Blue water filter housings. Made from NSF 61 certified Buna-N rubber, these O-rings ensure safe, leak-free operation. Each pack includes three OEM-sized O-rings (5.5" ID x 5.83" OD x 0.165" thick), compatible with multiple major brands, proudly assembled in the USA with warranty-backed quality.
| Asin | B0G2SR3JWK |
| Best Sellers Rank | #112 in Faucet O-Rings |
| Date First Available | 18 November 2025 |
User
Perfect Fit. Sat in Blue Blue Filter Housing and Secured First Attempt. 5 Stars
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.
User
Lo requerido
Funcionan
User
Perfect fit- fixed leaking Big Blue #20
Fast shipping. Perfect fit at a great price. The airing fit perfectly and fixed the leak in my Big Blue. I also ordered a new filter. Highly recommend this product. I got three for what Home Depot would charge for one. Highly recommend seller.
User
Fit and sealed and still working
Fit perfectly and sealed as expected to keep whole house filter from leaking.
User
Good replacement.
Good fitment. Seems to be good quality rubber. No leaks!
Trustpilot
4 days ago
1 week ago