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The Captain O-Ring OK25 Replacement Kit offers 8 premium Buna-N rubber O-rings in 4 sizes, compatible with multiple OmniFilter water filter housing models and revisions. Designed to ensure a perfect fit and leak-free seal, this NSF 61 certified, USA-assembled kit provides a reliable, easy solution for maintaining your water filtration system’s integrity.
| ASIN | B09QV5XS74 |
| Best Sellers Rank | #70,349 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #15 in Faucet O-Rings |
| Brand | Captain O-Ring |
| Brand Name | Captain O-Ring |
| Color | Black (Rubber) |
| Customer Reviews | 4.3 out of 5 stars 126 Reviews |
| Manufacturer | Captain O-Ring LLC |
| Material | Nitrile Rubber |
| Material Type | Nitrile Rubber |
| Number of Items | 8 |
| Number of Packs | 2 |
| Number of Pieces | 8 |
| Part Number | OK25-2set" or "OMNIFILTEROK25-2SETS-905813582e |
| Set Name | OmniFilter OK25 O-Ring Kit (2 Sets) |
| UPC | 810061940166 |
| Unit Count | 8 Count |
C**7
It fits!
The sediment filter brand have a replacement o-ring part number; however, there are several of this brand’s o-ring using the same part number. But, here is the kicker, that same part number cover at least 4 different diameter of o-rings. So, this set of o-rings was perfect as I could select which o-ring actually fit my filter housing. I also have an extra o-ring to boot. Thank you! Great a simple solution. The company making the filter housing I purchased never gave the o-ring size and thickness. No way to search and find one until Captain O-Ring came along.
A**R
Good 👍
Good deal and assortment of sizes for water filter housing.
J**N
They fit correctly
Great replacement orings
K**R
Various size
Package comes with a variety of sizes. I took one star off because you had to buy the whole package in order to get one size. I do not need the other sizes. But the price was reasonable enough.
H**E
Nothing
They fit just like they said they would. Delivered the next day
M**S
Not as advertised.
I bought this kit for an Omnifilter model OB1. None of the orings fit. None would stay in the groove. I worked with orings extensively throughout my career. I know what I am talking about. I am completely unsatisfied with this purchase. 4/2/25 UPDATE: Jon at Captain O’ring contacted us to help. I measured the groove for him and he found and sent the perfect size. He was very pleasant and professional. I am now happy and would definitely use Captain O’ring again!
C**.
The kit had all the sizes
Didn’t have to figure out what size to get with this kit and it had two of all the sizes for my brand of water filter. Worked perfect
A**R
Even those multiple set the oring for your filter is in the packet.
Multiple sets of O-rings in the packet
M**E
Excellent product
Excellent product. Worried perfect, fit exactly as stated. Would purchase them again
Trustpilot
5 days ago
3 days ago