---
product_id: 494597452
title: "MRbrew Plastic Carbonation Cap, 4 PCS Ball Lock Keg Post 5/16'' Beer Line Nipple Barb Homebrew Kegging Soft Soda Drink PET Bottles Counter Pressure Bottle Filling Cap with Spare Sealing Gasket O-rings"
brand: "mrbrew"
price: "₨11026"
currency: LKR
in_stock: true
reviews_count: 11
category: "M Rbrew"
url: https://www.desertcart.lk/products/494597452-mrbrew-plastic-carbonation-cap-4-pcs-ball-lock-keg-post
store_origin: LK
region: Sri Lanka
---

# 5/16'' beer line nipple barb 60 PSI pressure rating Leak-proof sealing O-rings MRbrew Plastic Carbonation Cap, 4 PCS Ball Lock Keg Post 5/16'' Beer Line Nipple Barb Homebrew Kegging Soft Soda Drink PET Bottles Counter Pressure Bottle Filling Cap with Spare Sealing Gasket O-rings

**Brand:** mrbrew
**Price:** ₨11026
**Availability:** ✅ In Stock

## Summary

> 🍺 Elevate your homebrew game with airtight, pro-grade carbonation!

## Quick Answers

- **What is this?** MRbrew Plastic Carbonation Cap, 4 PCS Ball Lock Keg Post 5/16'' Beer Line Nipple Barb Homebrew Kegging Soft Soda Drink PET Bottles Counter Pressure Bottle Filling Cap with Spare Sealing Gasket O-rings by mrbrew
- **How much does it cost?** ₨11026 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/494597452-mrbrew-plastic-carbonation-cap-4-pcs-ball-lock-keg-post)

## 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

- • **Leak-Proof O-Ring Seal:** Advanced gasket design ensures airtight, no-drip performance even under overnight pressure.
- • **Precision 5/16'' Barb Fitting:** Seamlessly connect to ball lock keg posts for versatile gas and liquid flow control.
- • **Rock-Solid 60 PSI Carbonation:** Push your brew to pro-level carbonation without fear of leaks or pressure loss.
- • **Multi-Use Mobile Kegging Solution:** Ideal for quick carbonation, cleaning lines, and serving craft brews on the go—be the host with the most.
- • **Universal 2L PET Bottle Compatibility:** Screws on standard soda bottles with surgical thread accuracy for a perfect fit every time.

## Overview

The MRbrew Plastic Carbonation Cap is a high-performance keg post cap designed for homebrewers and soda makers. It withstands up to 60 PSI pressure, features a secure 5/16'' beer line nipple barb, and includes advanced sealing O-rings to prevent leaks. Compatible with standard 2L PET bottles, it offers a versatile, easy-to-use solution for force carbonation, line cleaning, and portable kegging—perfect for elevating your craft beverage experience.

## Description

Shop MRbrew at the desertcart Home Brewing & Wine Making store. Free Shipping on eligible items. Everyday low prices, save up to 50%.

Review: As Advertised! - The Plastic Carbonation Cap with Ball Lock Keg Post works perfectly for quick carbonation and pressure transfers. It fits tightly, seals well, and is compatible with standard PET bottles
Review: Use all 4... great results at 50psi - I save the 1 quart soda bottles and refill with COLD (via frig) filtered water 3/4 full. Squeeze out the air, add one of these tops and tighten. Attach the ball cap fitting at 50 psi on the gauge and shake for 2 mins until you see very little bubbles coming out of the stem. I do 4 at a time. Then I unscrew the pressure cap, add a squirt of Stur or 1 tsp of Root Beer extract and vanilla and 2 Tbsp stevia sweetener... AND I use one of the other 4 bottles to top off each of the other 3! Put the old caps back on the bottles. Results in 3 full bottles. I do fresh squeezed lemon + lime too with 1/2 tsp of stevia. Easy way to make cheap soda's if you have the tank, gauge and hose around as beer/wine making equipment.

## Features

- Withstand 60-PSI Carbonation Pressure, Complete No Leaking Sealing O-Ring Design and Huge Upgrade From Old Plastic Version: MRbrew carbonation cap comes with necessary brewing sealing o-rings and washer replacemets to prevent leaks, there is a big flat gasket inside this carbonation cap compared to the old version plastic bottle filling cap, can run your carbonator at 60 psi pressure and hold pressure overnight, beer will not go flat, make a airtight seal and good fit for force carbonation.
- Sealing Gasket is Not Easy to Fall Out and Include 5/16 Barb Fitting Spare O-ring: the inside rubber sealing gasket features a right size for being placed tightly inside carbonating cap, which will stay in on its own when unscrewing off bottle filling cap, also provide 5/16'' beer nipple barb sealing o-ring replacements even such o-ring is screwed inside getting well protected. unlike other polished finish carbonation caps, you can grip this plastic carbonation cap easily when removing.
- Unique Carbonation Cap Keg Post is Perfect for Ball Lock System and Removable Beer Barb: carbonation cap features a unique keg post that has versatility and ease of use, can connect to both gas and liquid disconnects easily, beer 5/16'' hose barb not only enables carbonation cap to carbonate, but to be used for liquid connections and for cleaning as well. made of healthy plastic, no odors, no burrs or unfinished machining anywhere, will not bring strange smell to the carbonation drinks.
- Screws onto Standard 2L Soda Bottles Very Securely: this soda drink bottle filling cap features a great accuracy 1-1/8-8UN female thread that can be comparable to the thread of stainless carbonation cap, merge with the plastic PET bottle threads very smoothly, seals the bottles well without needing much torque, screws on and off of bottles easily creating a perfect tight seal every time, excellent tool if you are making homebrewing and kegging.
- Perfect for Various Brewing Occasions and Reduce CO2 Loss when Do Brewing Cleaning: carbonation cap is a cool way to re-carbonate beverage quickly, no foaming, great alternative for growlers, allows you to serve portable home brew beer, soda water, iced tea on barbecue, beach, lake or holiday parties, other outdoor activities, brings big convenience to mobile kegging. also can run the cleaner through beer lines from a small soda bottle preventing a larger keg from wasting more co2.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BJPQF9SH |
| Best Sellers Rank | #96,755 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #3 in Beer Brewing Pots & Kettles |
| Customer Reviews | 4.5 4.5 out of 5 stars (122) |
| Date First Available | October 19, 2022 |
| Item Weight | 2.64 ounces |
| Item model number | MRbrew |
| Package Dimensions | 6.65 x 4.21 x 1.46 inches |

## Images

![MRbrew Plastic Carbonation Cap, 4 PCS Ball Lock Keg Post 5/16'' Beer Line Nipple Barb Homebrew Kegging Soft Soda Drink PET Bottles Counter Pressure Bottle Filling Cap with Spare Sealing Gasket O-rings - Image 1](https://m.media-amazon.com/images/I/51Xbf8D6OeL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ As Advertised!
*by F***S on October 2, 2025*

The Plastic Carbonation Cap with Ball Lock Keg Post works perfectly for quick carbonation and pressure transfers. It fits tightly, seals well, and is compatible with standard PET bottles

### ⭐⭐⭐⭐⭐ Use all 4... great results at 50psi
*by G***S on June 3, 2023*

I save the 1 quart soda bottles and refill with COLD (via frig) filtered water 3/4 full. Squeeze out the air, add one of these tops and tighten. Attach the ball cap fitting at 50 psi on the gauge and shake for 2 mins until you see very little bubbles coming out of the stem. I do 4 at a time. Then I unscrew the pressure cap, add a squirt of Stur or 1 tsp of Root Beer extract and vanilla and 2 Tbsp stevia sweetener... AND I use one of the other 4 bottles to top off each of the other 3! Put the old caps back on the bottles. Results in 3 full bottles. I do fresh squeezed lemon + lime too with 1/2 tsp of stevia. Easy way to make cheap soda's if you have the tank, gauge and hose around as beer/wine making equipment.

### ⭐⭐⭐⭐ Great but alittle small issue.
*by A***R on November 21, 2025*

They are pretty good but the inside part can sometimes get lose so be mindful to check everyone and while to screen the spring tight.

## Frequently Bought Together

- MRbrew Plastic Carbonation Cap, 4 PCS Ball Lock Keg Post 5/16'' Beer Line Nipple Barb Homebrew Kegging Soft Soda Drink PET Bottles Counter Pressure Bottle Filling Cap with Spare Sealing Gasket O-rings
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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-25*