---
product_id: 406856194
title: "Captain O-Ring - Replacement OK25 O-Ring Kit Compatible with OmniFilter OB1, OB6, WH5, U25 Water Filter Housings (2 Sets, 8 O-Rings)"
brand: "captain o-ring"
price: "€ 25.86"
currency: EUR
in_stock: true
reviews_count: 8
category: "Captain O Ring"
url: https://www.desertcart.gr/products/406856194-captain-o-ring-replacement-ok25-o-ring-kit-compatible-omnifilter
store_origin: GR
region: Greece
---

# NSF 61 certified safe rubber 8 versatile O-rings included Proudly USA assembled Captain O-Ring - Replacement OK25 O-Ring Kit Compatible with OmniFilter OB1, OB6, WH5, U25 Water Filter Housings (2 Sets, 8 O-Rings)

**Brand:** captain o-ring
**Price:** € 25.86
**Availability:** ✅ In Stock

## Summary

> 💧 Seal the deal with confidence—never compromise on clean water!

## Quick Answers

- **What is this?** Captain O-Ring - Replacement OK25 O-Ring Kit Compatible with OmniFilter OB1, OB6, WH5, U25 Water Filter Housings (2 Sets, 8 O-Rings) by captain o-ring
- **How much does it cost?** € 25.86 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/406856194-captain-o-ring-replacement-ok25-o-ring-kit-compatible-omnifilter)

## Best For

- captain o-ring enthusiasts

## Why This Product

- Trusted captain o-ring brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ready When You Are:** 2 sets (8 O-rings) in resealable packaging—always have the right seal on hand for quick fixes.
- • **Leak-Proof Confidence:** Replace your O-ring every 3rd filter change to prevent leaks and maintain pristine water quality.
- • **Complete Compatibility Kit:** 4 O-ring sizes cover all OmniFilter OB1, OB6, WH5 & U25 revisions—never guess your fit again.
- • **Trusted American Craftsmanship:** Manufactured and warrantied by Captain O-Ring LLC, assembled in the USA for quality assurance.
- • **Premium NSF 61 Certified Material:** Crafted from durable, safe Buna-N rubber for clean, contaminant-free drinking water.

## Overview

The Captain O-Ring OK25 Replacement Kit includes 8 high-quality Buna-N rubber O-rings in 4 sizes, ensuring perfect compatibility with all revisions of OmniFilter OB1, OB6, WH5, and U25 water filter housings. NSF 61 certified and proudly assembled in the USA, this kit guarantees leak-free performance and peace of mind with every filter change.

## Description

The OK25 o-ring seals between your filter housing and filter head/cap on OmniFilter OB1, OB6. 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. Different revisions of each of these Omnifilter housing models take different sized o-rings. The OK25 kit contains all of the different sizes to ensure you have the right o-ring size needed for your OB1, OB6, WH5, or U25 housing. 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 by Captain O-Ring LLC. Proudly assembled in the USA! FAQ: Why does this kit include 4 different o-ring sizes. Can’t I just buy the one size I need for my exact filter model? Answer: Since there are multiple revisions of each of these filter housings, it is impossible to tell which o-ring you need until you have all 4 sizes on hand. For example, if you have a WH5 filter housing, yours may take any one size within this kit. Offering all of the o-rings in a kit is the only way that we (as well as the OEM) can guarantee that you get the correct o-ring for your exact submodel/revision of the filter housing you have.

Review: They fit correctly - Great replacement orings
Review: Good 👍 - Good deal and assortment of sizes for water filter housing.

## Features

- (2 Sets) OmniFilter OK25 Replacement O-Ring Gasket Seals (Includes 4 sizes, 2 of each)
- Compatible with OmniFilter OB1, OB6, WH5, and U25 water filter housings. Different revisions within each of these models take different o-rings, and the OK25 kit contains all of the different sizes to ensure you have the right o-ring size needed for your OB1, WH5, or U25 housing.
- Quickly fix or prevent a leak in your water filter unit by replacing your filter housing o-ring with every third filter change
- Molded from NSF 61 certified buna-n rubber for safe and clean drinking water.
- Manufactured and Warrantied by Captain O-Ring LLC. Proudly assembled in the USA!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09QV5XS74 |
| Best Sellers Rank | #94,068 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #26 in Faucet O-Rings |
| Brand | Captain O-Ring |
| Brand Name | Captain O-Ring |
| Color | Black (Rubber) |
| Customer Reviews | 4.2 out of 5 stars 108 Reviews |
| Manufacturer | Captain O-Ring LLC |
| Material | Nitrile Rubber |
| Material Type | Nitrile Rubber |
| UPC | 810061940166 |
| Unit Count | 8.0 Count |

## Product Details

- **Brand:** Captain O-Ring
- **Color:** Black (Rubber)
- **Manufacturer:** Captain O-Ring LLC
- **Material:** Nitrile Rubber
- **UPC:** 810061940166

## Images

![Captain O-Ring - Replacement OK25 O-Ring Kit Compatible with OmniFilter OB1, OB6, WH5, U25 Water Filter Housings (2 Sets, 8 O-Rings) - Image 1](https://m.media-amazon.com/images/I/61ujAQJ8gUL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ They fit correctly
*by J***N on August 21, 2025*

Great replacement orings

### ⭐⭐⭐⭐⭐ Good 👍
*by A***R on May 6, 2025*

Good deal and assortment of sizes for water filter housing.

### ⭐⭐⭐⭐⭐ Nothing
*by H***E on August 5, 2025*

They fit just like they said they would. Delivered the next day

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**Shop now:** [https://www.desertcart.gr/products/406856194-captain-o-ring-replacement-ok25-o-ring-kit-compatible-omnifilter](https://www.desertcart.gr/products/406856194-captain-o-ring-replacement-ok25-o-ring-kit-compatible-omnifilter)

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-01-31*