---
product_id: 99112700
title: "CO2 Tank Valve O-Ring Leak Stopper Permanent \"ABC\" Seal Washer Insert"
brand: "hbyob"
price: "HK$88"
currency: HKD
in_stock: true
reviews_count: 6
category: "Hbyob"
url: https://www.desertcart.hk/products/99112700-co2-tank-valve-o-ring-leak-stopper-permanent-abc-seal
store_origin: HK
region: Hong Kong
---

# Easy 5/32" Allen wrench install Fits standard CO2 cylinder valves Permanent leak-proof seal CO2 Tank Valve O-Ring Leak Stopper Permanent "ABC" Seal Washer Insert

**Brand:** hbyob
**Price:** HK$88
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal the deal, stop the leak—forever!

## Quick Answers

- **What is this?** CO2 Tank Valve O-Ring Leak Stopper Permanent "ABC" Seal Washer Insert by hbyob
- **How much does it cost?** HK$88 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/99112700-co2-tank-valve-o-ring-leak-stopper-permanent-abc-seal)

## Best For

- hbyob enthusiasts

## Why This Product

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

## Key Features

- • **Effortless Installation:** Screws in with a simple Allen wrench—no extra tools or modifications needed.
- • **Universal Compatibility:** Designed to fit all standard CO2 cylinder valves seamlessly.
- • **Ultimate Leak Protection:** Creates a rock-solid, permanent seal that stops CO2 leaks for good.
- • **Trusted by Brewers & Pros:** Highly rated by users who demand zero pressure drops and flawless performance.
- • **Maintenance-Free Peace of Mind:** Forget frequent seal changes—this O-ring insert is built to last.

## Overview

The CO2 Tank Valve O-Ring Leak Stopper is a compact, easy-to-install insert that fits standard CO2 cylinder valves to create a permanent, leak-proof seal. Requiring only a 5/32" Allen wrench, it eliminates the need for regulator or cylinder modifications and prevents costly CO2 loss, making it a must-have for kegerator owners and brewing professionals seeking reliable, maintenance-free performance.

## Description

The CO2 leak stopper screws into a standard carbon dioxide cylinder valve, between the regulator and valve, to create a tight, secure seal. The only tool you need is a 5/32" Allen Wrench and a CO2 cylinder you don't want to be worried about having to change the seals on, because this is your permanent solution! Comes with o-ring insert

Review: Very speculative this would work - I had a sloooooow leak that was driving me crazy. Tried multiple gaskets and changes and lost a large tank of co2. This thing seems to work well as no more leaks. Just remember, always lube your O ring.
Review: Works Great! Fixed my leaks - I had a leak on my kegerator between the tank and regulator and this did the trick to seal it amazingly well. Installed it onto the tank putting some keg lube onto both sides of o-ring, removed the plastic washer from the regulator and I have absolutely zero pressure drop on my high pressure gauge after hours of having the tank turned off. What a life saver, highly recommended!

## Features

- Ends leaks between cylinder and regulator
- Screws into standard CO2 cylinder valve
- No cylinder or regulator modifications necessary

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07KCLB2FY |
| Best Sellers Rank | #639,840 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #3,052 in Beer Brewing Equipment |
| Customer Reviews | 4.2 4.2 out of 5 stars (40) |
| Date First Available | October 26, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.634 ounces |
| Package Dimensions | 1 x 1 x 0.5 inches |

## Images

![CO2 Tank Valve O-Ring Leak Stopper Permanent "ABC" Seal Washer Insert - Image 1](https://m.media-amazon.com/images/I/61SyCqtlGaL.jpg)

## Questions & Answers

**Q: Is this price for one washer or a 10 pack?  they can be bought locally for 99 cents.**
A: Yeah for just one crazy huh

**Q: Do I need a hex wrench to install this into the cylinder or do you install it in the regulator? Thank you**
A: You don’t want to get it too tight or you’ll have trouble removing it for refills. I just finger tightened mine into the cylinder without issues.

**Q: What size is the black o-ring? Is it replaceable?**
A: I've always used the plain white nylon washers. I have one of these brass ones also, but as far as I know, that black O ring isn't replaceable, unless Amazon sells em. The nylon o rings are cheap, reusable & less hassle as far as I'm concerned.If you dig out the black o ring, you may run it by an Ace hdwre & try replacing. Good luck

**Q: What oring size do I get?  Mine went bad.**
A: You should order another one. Everything eventually fails and they aren't that expensive.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very speculative this would work
*by M***J on December 9, 2024*

I had a sloooooow leak that was driving me crazy. Tried multiple gaskets and changes and lost a large tank of co2. This thing seems to work well as no more leaks. Just remember, always lube your O ring.

### ⭐⭐⭐⭐⭐ Works Great! Fixed my leaks
*by P***E on March 8, 2023*

I had a leak on my kegerator between the tank and regulator and this did the trick to seal it amazingly well. Installed it onto the tank putting some keg lube onto both sides of o-ring, removed the plastic washer from the regulator and I have absolutely zero pressure drop on my high pressure gauge after hours of having the tank turned off. What a life saver, highly recommended!

### ⭐ Is made of weakest material ever
*by S***Y on January 6, 2025*

I used this on my CO2 tank and hand tightened it on the nozzle of the tank. When I attached the CO2 regulator something did not feel right. After taking it apart again I found that the upper part with the O ring that makes the seal had broken off the threaded part rendering the part totally useless. Not worth a penny in my opinion!

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**Shop now:** [https://www.desertcart.hk/products/99112700-co2-tank-valve-o-ring-leak-stopper-permanent-abc-seal](https://www.desertcart.hk/products/99112700-co2-tank-valve-o-ring-leak-stopper-permanent-abc-seal)

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-03-04*