💧 Seal the deal with confidence — no leaks, no stress!
Captain O-Ring’s Replacement 151122 O-Rings (3 Pack) are precision-engineered Buna-N seals compatible with Pentair Pentek Big Blue water filter housings. These NSF 61 certified o-rings ensure a perfect OEM fit, delivering leak-proof performance and easy installation. Proudly assembled in the USA, they come with a trusted warranty to keep your water filtration system running flawlessly.
| ASIN | B0G2SR3JWK |
| Best Sellers Rank | #97,444 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #105 in Faucet O-Rings |
| Customer reviews | 4.5 4.5 out of 5 stars (3,027) |
| Date First Available | 18 November 2025 |
C**S
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.
J**H
Good fitment. Seems to be good quality rubber. No leaks!
E**Z
Muy buen producto, hecho con buenos materiales y también buenos terminados
G**N
Excellent fit. Cured water leakage problem.
J**E
No issues.
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