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Your cart is empty.The OK25 o-ring seals between your filter housing and filter head/cap on OmniFilter OB1, WH5, and U25 water filter housings. The OK25 o-ring kit contains four different o-ring sizes. This convenient 2 set package contains 2 of each size, for 8 o-rings total.
What to expect:
This item includes eight (8) o-rings 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.
Chris T.
2025-07-11 10:30:27
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
John Giltrop
2025-06-22 14:14:12
Fits well and no leaks. Slides right on.
Carun7
2025-06-21 14:03:33
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.
Lori Booth
2025-05-09 17:10:24
Fit
MS
2025-04-11 13:51:20
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.
Pilipo
2025-04-10 17:59:50
Prompt service, good value
Dave
2025-01-23 11:59:29
I received a kit of various sized rings. AlI wanted was a pack of same size rings. The size used when changing the filter. Rings were good but not what Ineeded.
Ellen C
2025-01-19 12:16:51
Order this o-ring for the older Omnifilter 0B1 (with the blue o-ring). "O-ring Size 238, 3-1/2" ID x 3-3/4" OD x 1/8" thick". This should have been stated in the description.
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