--- product_id: 406856194 title: "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: "฿1406" currency: THB in_stock: true reviews_count: 8 category: "Captain O Ring" url: https://www.desertcart.co.th/products/406856194-replacement-ok25-o-ring-kit-compatible-with-omnifilter-ob1-ob6 store_origin: TH region: Thailand --- # NSF 61 certified safe rubber 8 versatile O-rings included Proudly USA assembled 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:** ฿1406 **Availability:** ✅ In Stock ## Summary > 💧 Seal the deal with confidence—never compromise on clean water! ## Quick Answers - **What is this?** 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?** ฿1406 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/406856194-replacement-ok25-o-ring-kit-compatible-with-omnifilter-ob1-ob6) ## 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 ![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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.th/products/406856194-replacement-ok25-o-ring-kit-compatible-with-omnifilter-ob1-ob6](https://www.desertcart.co.th/products/406856194-replacement-ok25-o-ring-kit-compatible-with-omnifilter-ob1-ob6) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-29*