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Your cart is empty.The OK7 Replacement O-Ring Kit (also called OK7-DC6-S06, OK7-R-01, OK7-R-02, OK7-S6-05, OK7-DC6-S18) contains 2 different o-ring sizes. This convenient 2 set package contains 2 of each size, for 4 o-rings total.
Compatible with:
OmniFilter BF6, BF7, BF7a (BF7 Series A), BF35, BF36, BF36C, BF55, BF56, PB35, PB55.
Alternate Part Numbers:
OK7-DC6-S06, OK7-R-01, OK7-R-02, OK7-S6-05, OK7-DC6-S18
What to expect:
This item includes four (4) o-rings (2 sizes, 2 of each size) in a resealable zip-top poly bag with "Captain O-Ring" branded packaging.
Manufactured and warrantied against defect for one year by Captain O-Ring LLC. "Captain O-Ring" is a registered trademark of Captain O-Ring LLC.
Dawn Snyder
Reviewed in the United States on March 8, 2025
Exactly what I needed to fix my leak. Fit perfectly. Exactly as described
MJM
Reviewed in the United States on March 20, 2024
I measured the O ring from a new BF7 unit and the original ring with the unit was bigger than the small ring in the package and the 2nd size in the package was larger than the original ring. I suspect that the oversize ring would work if you ran into a leakage issue. I am keeping these just in case I have a problem in the future. Reasonable price and if functional. Seems like the best choice as none of the seller show the size of the O rings being sold.
Ormonde Butler
Reviewed in the United States on March 23, 2023
Wrong size o-ring needed to be 5 and 5/8 was 5 and 3/4
Sloppyjoejo
Reviewed in the United States on December 4, 2022
I have an older BF7 whole house filter and when I replaced the O-Ring with a standard replacement I could not get it to stop leaking. I put the old O-Ring back on and ordered the Captain O-Ring-OK7 replacement set that included the oversize O-Ring along with the OEM size. It worked great. Don't know how they found out this was a common problem with this unit and started including the extra size option but I am glad they did.
Bradley W.
Reviewed in the United States on December 12, 2022
The device work as I expected it to
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