---
product_id: 35864717
title: "Wellmate Well Mate Pentair Air Cell/Bladder Replacement Kit Wm-6 Wm-9 Wm-12 Wm-14wb Wm-20wb Wm23 Wm-25wb Wm-35wb (WM-6 / WM0075 PEU CH3133-2)"
brand: "pentair"
price: "$U26755"
currency: UYU
in_stock: true
reviews_count: 8
category: "Pentair"
url: https://www.desertcart.uy/products/35864717-wellmate-well-mate-pentair-air-cell-bladder-replacement-kit-wm
store_origin: UY
region: Uruguay
---

# Compatible with newer gray tanks only Genuine Wellmate air cell kit Includes O-rings, washers & instructions Wellmate Well Mate Pentair Air Cell/Bladder Replacement Kit Wm-6 Wm-9 Wm-12 Wm-14wb Wm-20wb Wm23 Wm-25wb Wm-35wb (WM-6 / WM0075 PEU CH3133-2)

**Brand:** pentair
**Price:** $U26755
**Availability:** ✅ In Stock

## Summary

> 🛠️ Upgrade your well tank, upgrade your peace of mind!

## Quick Answers

- **What is this?** Wellmate Well Mate Pentair Air Cell/Bladder Replacement Kit Wm-6 Wm-9 Wm-12 Wm-14wb Wm-20wb Wm23 Wm-25wb Wm-35wb (WM-6 / WM0075 PEU CH3133-2) by pentair
- **How much does it cost?** $U26755 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/35864717-wellmate-well-mate-pentair-air-cell-bladder-replacement-kit-wm)

## Best For

- pentair enthusiasts

## Why This Product

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

## Key Features

- • **Gray Tank Compatibility:** Specifically designed for newer gray-colored tanks, ensuring perfect fit and function.
- • **Cost-Effective Longevity:** Save hundreds by replacing the bladder instead of the entire tank—smart maintenance for savvy pros.
- • **Factory Sealed Freshness:** Brand new, factory-sealed packaging guarantees quality and fast shipping to get you back in action.
- • **Complete Installation Kit:** Everything you need—O-rings, washers, and clear instructions—for a seamless DIY upgrade.
- • **Precision Engineered Replacement:** Restore your well tank’s peak performance with a genuine Wellmate air cell kit.

## Overview

The Wellmate Well Mate Pentair Air Cell/Bladder Replacement Kit is a genuine, factory-sealed kit designed for newer gray-colored Wellmate tanks. It includes all necessary components—O-rings, washers, and instructions—to replace the air bladder, extending the life of your well tank and saving you significant replacement costs.

## Description

This is the replacement bladder/Air Cell Kit for a Wellmate WM-6.

Review: A little difficult to install but well worth it - It was difficult to install but definitely worth the trouble, saving hundreds of dollars installing this as opposed to replacing the tank. The most difficult part was threading the string from the bottom of the tank to the top. You also need a valve stem removal tool, the kind you use on a bike. After install it works perfectly.
Review: Replaced original 20 year old bladder with this new one! - It works great. Instructions were a bit confusing as others have stated. I did use the white nylon “retainer” under the black rubber seal washer. Took a couple of hours to do. My wife and I, mid 70’s did it ourselves. We also replaced some plumbing, installed a drain, and replaced the pressure switch to the tank.

## Features

- Genuine WELLMATE brand BUTY AIR CELL REPLACEMENT KIT
- INCLUDES INSTRUCTIONS, O-RINGS,WASHERS AND AIR CELL
- COMPATIBLE WITH QUICK CONNECT AND OR CLASSIC MODEL
- WORKS ONLY WITH NEWER "GRAY" COLORED TANKS ( NOT YELLOW)
- BRAND NEW IN FACTORY SEALED BOX... SHIPS FAST!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01AV7PRKO |
| Best Sellers Rank | #272,764 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #774 in Cartridge Pool Filters |
| Customer Reviews | 3.9 3.9 out of 5 stars (43) |
| Date First Available | November 5, 2015 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1 pounds |
| Item model number | CH3133-2 CH3134-2 CH3135-2 CH4466 CH4846 |
| Manufacturer | Wellmate Well Mate Pentair |

## Images

![Wellmate Well Mate Pentair Air Cell/Bladder Replacement Kit Wm-6 Wm-9 Wm-12 Wm-14wb Wm-20wb Wm23 Wm-25wb Wm-35wb (WM-6 / WM0075 PEU CH3133-2) - Image 1](https://m.media-amazon.com/images/I/4147MIKDpKL.jpg)
![Wellmate Well Mate Pentair Air Cell/Bladder Replacement Kit Wm-6 Wm-9 Wm-12 Wm-14wb Wm-20wb Wm23 Wm-25wb Wm-35wb (WM-6 / WM0075 PEU CH3133-2) - Image 2](https://m.media-amazon.com/images/I/41IwTul1BzL.jpg)
![Wellmate Well Mate Pentair Air Cell/Bladder Replacement Kit Wm-6 Wm-9 Wm-12 Wm-14wb Wm-20wb Wm23 Wm-25wb Wm-35wb (WM-6 / WM0075 PEU CH3133-2) - Image 3](https://m.media-amazon.com/images/I/81yU6XR5SaL.jpg)
![Wellmate Well Mate Pentair Air Cell/Bladder Replacement Kit Wm-6 Wm-9 Wm-12 Wm-14wb Wm-20wb Wm23 Wm-25wb Wm-35wb (WM-6 / WM0075 PEU CH3133-2) - Image 4](https://m.media-amazon.com/images/I/91k1QlayLxL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: come with instructions?**
A: Yes, and they are clear and well-diagrammed.

**Q: What is the size of the box?**
A: For the WM-6 bladder, the box size is 5.5" x 10.5" x 12.5".

**Q: Do you have a u31-396p air cell for a signature 2000(sr60-18-01)???**
A: i don't believe they are made any longer.

**Q: Don't you have the WM12?**
A: yes we do

## Customer Reviews

### ⭐⭐⭐⭐⭐ A little difficult to install but well worth it
*by C***E on July 7, 2024*

It was difficult to install but definitely worth the trouble, saving hundreds of dollars installing this as opposed to replacing the tank. The most difficult part was threading the string from the bottom of the tank to the top. You also need a valve stem removal tool, the kind you use on a bike. After install it works perfectly.

### ⭐⭐⭐⭐⭐ Replaced original 20 year old bladder with this new one!
*by G***. on April 12, 2025*

It works great. Instructions were a bit confusing as others have stated. I did use the white nylon “retainer” under the black rubber seal washer. Took a couple of hours to do. My wife and I, mid 70’s did it ourselves. We also replaced some plumbing, installed a drain, and replaced the pressure switch to the tank.

### ⭐ Too small for wm-12
*by C***R on April 16, 2023*

Compared to the original bladder in my wm-12 tank, this bladder is of much thinner material. I am unsure iif this makes any difference. More of a problem, that per the product description this bladder shoudl fit several different tank models, including my wm-12. The bladder clearly cannot be installed on a WM-12, it will not span the 2 mount points. It is 5-7 inches shorter than the original bladder, and because of this, it cannot be installed. No idea who makes this, does not look like an oem oart. Fortunately, I am still within my return window.

## Frequently Bought Together

- Wellmate Well Mate Pentair Air Cell/Bladder Replacement Kit Wm-6 Wm-9 Wm-12 Wm-14wb Wm-20wb Wm23 Wm-25wb Wm-35wb (WM-6 / WM0075 PEU CH3133-2)
- Sikaflex Crack Flex Sealant, Gray, High performance, textured polyurethane sealant, self-leveling, sealant for sealing horizontal cracks, 10,1 fl. Oz

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-03-14*