---
product_id: 620325216
title: "MRbrew Stainless Steel Carbonation Cap, Ball Lock Keg Post 5/16'' Beer Line Nipple Barb & CO2 Coupling for Soda Drink, PET Bottles Counter Pressure Bottle Filling Cap with Gasket & O-Rings"
brand: "mrbrew"
price: "5474 kr"
currency: ISK
in_stock: true
reviews_count: 3
category: "M Rbrew"
url: https://www.desertcart.is/products/620325216-mrbrew-stainless-steel-carbonation-cap-ball-lock-keg-post-5
store_origin: IS
region: Iceland
---

# Leak-Proof 2L Soda Bottle Fit Universal Ball Lock Compatible 304 Stainless Steel Durability MRbrew Stainless Steel Carbonation Cap, Ball Lock Keg Post 5/16'' Beer Line Nipple Barb & CO2 Coupling for Soda Drink, PET Bottles Counter Pressure Bottle Filling Cap with Gasket & O-Rings

**Brand:** mrbrew
**Price:** 5474 kr
**Availability:** ✅ In Stock

## Summary

> 🍺 Lock in Freshness, Unlock Flavor – The Ultimate Carbonation Cap for Homebrew Pros

## Quick Answers

- **What is this?** MRbrew Stainless Steel Carbonation Cap, Ball Lock Keg Post 5/16'' Beer Line Nipple Barb & CO2 Coupling for Soda Drink, PET Bottles Counter Pressure Bottle Filling Cap with Gasket & O-Rings by mrbrew
- **How much does it cost?** 5474 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/620325216-mrbrew-stainless-steel-carbonation-cap-ball-lock-keg-post-5)

## Best For

- mrbrew enthusiasts

## Why This Product

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

## Key Features

- • **Built to Withstand 60 PSI:** Engineered for high-pressure carbonation without leaks—keep your brews perfectly fizzy.
- • **Multi-Use Homebrew Essential:** Ideal for carbonating, cleaning beer lines, and reviving flat drinks—your go-to for every brew adventure.
- • **Premium Food-Grade Materials:** Crafted from rust-resistant 304 stainless steel and safe silicone gaskets for clean, odor-free carbonation.
- • **Seamless Ball Lock Integration:** Effortlessly connects with standard gas and liquid ball lock disconnects for versatile kegging.
- • **Precision Fit for 2L PET Bottles:** Screws on smoothly with a secure, airtight seal—no over-tightening needed.

## Overview

The MRbrew Stainless Steel Carbonation Cap is a high-performance, food-safe accessory designed to maintain carbonation in 2-liter PET bottles. Featuring durable 304 stainless steel construction, universal ball lock compatibility, and a leak-proof seal that withstands up to 60 PSI, it’s perfect for homebrewers seeking reliable carbonation, efficient beer line cleaning, and versatile beverage preservation.

## Description

MRbrew Commercial Quality and Dependability Healthy Stainless Steel 304 Brewing Carbonation Cap Saves the use of an extra keg or co2 to clean out Can be used on your fermenter for cold crashing and used for closed-loop transfers to the keg Perfect for more evenly carbonating kombucha and fresh watermelon juice to make watermelon soda Super helpful in restoring life to growlers of semi-flat beer, cheap grocery store wine, even fruit juices Great sealing and work well for pressurizing and carbonating 2-liter soda bottles, allows transport of homebrew Seals quickly and easily to your co2 supply with a standard cornelius keg ball lock gas fitting, slides into and out of the ball lock with minimum effort Use for Brewing Carbonation Cleaning: Excellent for beer line flushing from kegs to beer taps through a ball-lock fitting Can be used this carbonation cap in conjunction with a small pond pump to build a recirculating tap line cleaner Simple, Quick Carbonation Tips: Co2 gas your bottle, release, gas again, release Fill your bottle with cold home brew, carbonate, wait a few seconds, release Carbonate again, disconnect co2 and shake the bottle for several seconds Wait for a minute then unscrew the carbonation cap and put your bottle cap on

Review: These do not at all work and I'm surprised nobody has noticed. They went to a new design, not the one shown in the pictures, with a spring and a piston. Not sure what's happening but I think they don't provide enough back force to open the valve in the cap that goes on top. I have tried _3_ of these with this new, non working design that apparently nobody noticed literally doesn't work, and only the old design works.
Review: I got this to replace a plastic carbonation caps that I use. I am a homebrewer, and when I want to take beer over to a friend's house, I can make sure that I keep it with the best quality until it's opened. Additionally, I use these to keep soda carbonated. It's cheaper to buy soda in a 2L, but if you don't drink a lot, it will go flat quickly... but not with these bad boys!

## Features

- ✅ Withstands 60 PSI : Built for high performance, the MRbrew carbonation cap holds up to 60 PSI without leaking. This cap features a large flat gasket and upgraded O-ring for a completely airtight seal—ensuring your beer stays fresh and carbonated overnight. Ideal for force carbonation and bottle conditioning.
- ⚙️ Universal Ball Lock Compatibility: Designed for versatility, the integrated keg post connects easily with both gas and liquid ball lock disconnects. The removable 5/16” beer barb supports both carbonation and liquid transfers—perfect for homebrew cleaning systems too. All parts are pre-assembled and secure, so there's no risk of accidental disassembly.
- 🧊Snug Fit for Standard 2L Soda Bottles: Featuring precise 1-1/8-8UN threading, this carbonation cap screws onto most 2-liter PET soda bottles securely and smoothly. Creates a leak-proof seal without excessive torque, making it an excellent tool for homebrewers who want to keep beverages carbonated longer and fresher.
- 🛡Premium 304 Stainless Steel & Food-Grade Seals: Crafted from high-quality 304 stainless steel, food-safe rubber, and silicone, this carbonation cap ensures long-lasting performance without rust, odors, or sharp edges. All sealing gaskets are perfectly fitted and stay in place during use, keeping your drinks clean and safe.
- 🍻Perfect for Homebrew: Re-carbonate soda, beer, or cold brew on the go—ideal for BBQs, tailgates, camping, or holiday parties. Also works great for running cleaner through beer lines using a small bottle setup, minimizing CO₂ waste compared to cleaning with a full keg. A must-have for every mobile homebrewer.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CSXWY571 |
| Best Sellers Rank | 1,969,186 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 412 in Kegging Tools |
| Brand | MRbrew |
| Customer Reviews | 3.8 3.8 out of 5 stars (9) |
| Date First Available | 29 Jan. 2024 |
| Item Weight | 91 g |
| Model Number | M-SCC-1 |
| Package Dimensions | 13.11 x 7.7 x 3 cm; 91 g |

## Images

![MRbrew Stainless Steel Carbonation Cap, Ball Lock Keg Post 5/16'' Beer Line Nipple Barb & CO2 Coupling for Soda Drink, PET Bottles Counter Pressure Bottle Filling Cap with Gasket & O-Rings - Image 1](https://m.media-amazon.com/images/I/316JTNRYDgL.jpg)
![MRbrew Stainless Steel Carbonation Cap, Ball Lock Keg Post 5/16'' Beer Line Nipple Barb & CO2 Coupling for Soda Drink, PET Bottles Counter Pressure Bottle Filling Cap with Gasket & O-Rings - Image 2](https://m.media-amazon.com/images/I/31IZV7m8E3L.jpg)
![MRbrew Stainless Steel Carbonation Cap, Ball Lock Keg Post 5/16'' Beer Line Nipple Barb & CO2 Coupling for Soda Drink, PET Bottles Counter Pressure Bottle Filling Cap with Gasket & O-Rings - Image 3](https://m.media-amazon.com/images/I/31XhL8FwzAL.jpg)
![MRbrew Stainless Steel Carbonation Cap, Ball Lock Keg Post 5/16'' Beer Line Nipple Barb & CO2 Coupling for Soda Drink, PET Bottles Counter Pressure Bottle Filling Cap with Gasket & O-Rings - Image 4](https://m.media-amazon.com/images/I/41i-XWsz9JL.jpg)
![MRbrew Stainless Steel Carbonation Cap, Ball Lock Keg Post 5/16'' Beer Line Nipple Barb & CO2 Coupling for Soda Drink, PET Bottles Counter Pressure Bottle Filling Cap with Gasket & O-Rings - Image 5](https://m.media-amazon.com/images/I/41xLXQtN2ZL.jpg)

## Customer Reviews

### ⭐ Review
*by A***R on 22 January 2026*

These do not at all work and I'm surprised nobody has noticed. They went to a new design, not the one shown in the pictures, with a spring and a piston. Not sure what's happening but I think they don't provide enough back force to open the valve in the cap that goes on top. I have tried _3_ of these with this new, non working design that apparently nobody noticed literally doesn't work, and only the old design works.

### ⭐⭐⭐⭐⭐ Review
*by R***R on 21 April 2024*

I got this to replace a plastic carbonation caps that I use. I am a homebrewer, and when I want to take beer over to a friend's house, I can make sure that I keep it with the best quality until it's opened. Additionally, I use these to keep soda carbonated. It's cheaper to buy soda in a 2L, but if you don't drink a lot, it will go flat quickly... but not with these bad boys!

### ⭐⭐⭐⭐⭐ Review
*by M***T on 29 February 2024*

This is a high quality carbonation cap. My ball locks fit it perfectly. I disassembled and reassembled the cap and everything fit well. I filled an empty bottle with co2 and did not lose any pressure in 2 days. This is a lot better than the plastic carbonation caps. The bottle becomes the consumable item instead of the carbonation cap.

## Frequently Bought Together

- MRbrew Stainless Steel Carbonation Cap, Ball Lock Keg Post 5/16'' Beer Line Nipple Barb & CO2 Coupling for Soda Drink, PET Bottles Counter Pressure Bottle Filling Cap with Gasket & O-Rings
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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-04*