---
product_id: 23942697
title: "Captain O-Ring - Replacement 151122 O-Rings Compatible with Pentair Pentek Big Blue Water Filters OEM Size ORing Buna-N (3 Pack)"
brand: "captain o-ring"
price: "€ 18.01"
currency: EUR
in_stock: true
reviews_count: 13
category: "Captain O Ring"
url: https://www.desertcart.ie/products/23942697-captain-o-ring-replacement-151122-o-rings-compatible-with-pentair
store_origin: IE
region: Ireland
---

# Leakproof Buna-N seal Precision OEM size fit Proudly USA assembled Captain O-Ring - Replacement 151122 O-Rings Compatible with Pentair Pentek Big Blue Water Filters OEM Size ORing Buna-N (3 Pack)

**Brand:** captain o-ring
**Price:** € 18.01
**Availability:** ✅ In Stock

## Summary

> 💧 Seal the deal with confidence – no leaks, no stress!

## Quick Answers

- **What is this?** Captain O-Ring - Replacement 151122 O-Rings Compatible with Pentair Pentek Big Blue Water Filters OEM Size ORing Buna-N (3 Pack) by captain o-ring
- **How much does it cost?** € 18.01 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/23942697-captain-o-ring-replacement-151122-o-rings-compatible-with-pentair)

## 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

- • **Perfect OEM Fit:** Engineered to match Pentair Pentek Big Blue housings exactly for hassle-free installation.
- • **Triple Pack Value:** Three durable o-rings included to keep your water filter leakproof longer without frequent replacements.
- • **NSF 61 Certified Buna-N:** Safe, clean drinking water guaranteed with high-grade, certified rubber material.
- • **Effortless Leakproof Seal:** Designed to seat perfectly on the first try, eliminating frustrating leaks and reassembly.
- • **Trusted American Craftsmanship:** Manufactured and assembled in the USA by Captain O-Ring LLC, ensuring quality and reliability.

## Overview

Captain O-Ring’s 151122 replacement o-rings are precision-engineered Buna-N seals compatible with Pentair Pentek Big Blue water filter housings. This 3-pack offers NSF 61 certified, leakproof performance with exact OEM sizing (5.5" ID x 5.83" OD x 0.165" thickness), proudly assembled in the USA to ensure clean, safe drinking water and hassle-free installation.

## Description

desertcart.com: Captain O-Ring - Replacement 151122 O-Rings Compatible with Pentair Pentek Big Blue Water Filters OEM Size ORing Buna-N (3 Pack) : Tools & Home Improvement

Review: Perfect fit for Big Blue filter - These o-rings fit the Pentair Big Blue filter much better than other brands I have bought. Other brands had a diameter slightly too big for the o-ring channel in the filter sump, making it difficult to seat them in the channel, which required multiple attempts to reattach the sump to the top of the filter to get the assembly leaktight. These o-rings were just right. They seated totally within and against the outside wall of the filter sump o-ring channel, so when the sump was reattached to the top the filter it was leaktight on the first try.
Review: Great fit, finish, and function - No issues.

## Features

- Replacement 151122 o-rings compatible with Pentair/Pentek style Big Blue Water Filter Housings (3 Pack)
- Includes 3 replacement o-rings (also called seals or gaskets) to repair your leaking water filter housing [OEM UPC: 051678511220 , 885343762095]
- 151122 OEM Size o-rings are approximately 5.5" Inside Diameter x 5.83" Outside Diameter x 0.165" Thickness. Please confirm that you need this size o-ring and that your filter housing is listed on the list of compatible housings or that your product manual calls for the 151122 o-ring part number or one of the other part numbers listed below.
- Direct Replacement for the following part numbers (see description below for full water filter compatibility list): Ace Hardware 4001756; American Plumber 152032, W10-OR; APEC O-RING-HB; Ametek Kleen-Plus 151122-03; Culligan OR-100, 151122-27, 01019189; HomeMaster #Oring122; Pentek 151122, BB BUNA-N
- 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 | B019Y85PR6 |
| Best Sellers Rank | #4,493 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Undersink Water Filtration Replacement Parts |
| Brand | Captain O-Ring |
| Color | black |
| Date First Available | December 29, 2015 |
| EU Spare Part Availability Duration | 1 Years |
| Is Discontinued By Manufacturer | No |
| Item Diameter | 5.83 Inches |
| Item Weight | 0.64 ounces |
| Item model number | 151122x3 |
| Manufacturer | Captain O-Ring LLC |
| Material | Buna-N Rubber (NSF61 Certified) |
| Nominal Inside Diameter | 5.5 Inches |
| Nominal Outside Diameter | 5.83 Inches |
| Number of Pieces | 3 |
| Set Name | 3 Pack |
| Temperature Range | 4E+1 Degrees Fahrenheit |
| UPC | 722589526046 |
| Unit Count | 3 Count |

## Product Details

- **Brand:** Captain O-Ring
- **Color:** black
- **Item Diameter:** 5.83 Inches
- **Material:** Buna-N Rubber (NSF61 Certified)
- **Nominal Inside Diameter:** 5.5 Inches

## Images

![Captain O-Ring - Replacement 151122 O-Rings Compatible with Pentair Pentek Big Blue Water Filters OEM Size ORing Buna-N (3 Pack) - Image 1](https://m.media-amazon.com/images/I/61crbTY-o3L.jpg)
![Captain O-Ring - Replacement 151122 O-Rings Compatible with Pentair Pentek Big Blue Water Filters OEM Size ORing Buna-N (3 Pack) - Image 2](https://m.media-amazon.com/images/I/71R81PJXyaL.jpg)
![Captain O-Ring - Replacement 151122 O-Rings Compatible with Pentair Pentek Big Blue Water Filters OEM Size ORing Buna-N (3 Pack) - Image 3](https://m.media-amazon.com/images/I/81NAd6c3y8L.jpg)
![Captain O-Ring - Replacement 151122 O-Rings Compatible with Pentair Pentek Big Blue Water Filters OEM Size ORing Buna-N (3 Pack) - Image 4](https://m.media-amazon.com/images/I/712FUqHv7zL.jpg)
![Captain O-Ring - Replacement 151122 O-Rings Compatible with Pentair Pentek Big Blue Water Filters OEM Size ORing Buna-N (3 Pack) - Image 5](https://m.media-amazon.com/images/I/715qz9cT8mL.jpg)

## Available Options

This product comes in different **Item Package Quantity** options.

## Questions & Answers

**Q: can this ring be streching?**
A: Do you mean can it be stretched?  Essentially, no.  A little bit, but O-rings are not elastic like rubber bands.

**Q: Anyone tried these on us water systems magna (grey housing) filters?**
A: It's plumbing.  There's no way to know whether a gasket or part will fit without buying it and trying it.

**Q: is this the o ring for an Aqua Flow 26258?**
A: The filter housing for this ring is for a 20" Big Blue filter which was installed by Culligan......my guess is the diameter is a standard size for any 20" housing.....but best to confirm with Aqua Flow

**Q: Will these fit the eco pure epw4 filter**
A: i dont believe so

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect fit for Big Blue filter
*by C***S on October 27, 2025*

These o-rings fit the Pentair Big Blue filter much better than other brands I have bought. Other brands had a diameter slightly too big for the o-ring channel in the filter sump, making it difficult to seat them in the channel, which required multiple attempts to reattach the sump to the top of the filter to get the assembly leaktight. These o-rings were just right. They seated totally within and against the outside wall of the filter sump o-ring channel, so when the sump was reattached to the top the filter it was leaktight on the first try.

### ⭐⭐⭐⭐⭐ Great fit, finish, and function
*by J***E on December 29, 2025*

No issues.

### ⭐⭐⭐⭐ Great fit, no leaks
*by A***R on October 15, 2025*

Fits my American Plumber filter housing perfectly, no leaks so far even though it may be just a bit thinner in diameter. I just installed it so I can't give it 5 stars until I know how the longevity is. This was tough to find locally so I'm glad to have found these. Most o rings of this size are $9 in retail stores so for a few dollars more you get 3 in the package making them a good value.

## Frequently Bought Together

- Captain O-Ring - Replacement 151122 O-Rings Compatible with Pentair Pentek Big Blue Water Filters OEM Size ORing Buna-N (3 Pack)
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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-22*