--- product_id: 509423192 title: "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: "€ 41.95" currency: EUR in_stock: true reviews_count: 8 category: "M Rbrew" url: https://www.desertcart.it/products/509423192-plastic-carbonation-cap-4-pcs-ball-lock-keg-post-5 store_origin: IT region: Italy --- # 5/16'' beer line nipple barb 60 PSI pressure rating Leak-proof sealing O-rings 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:** € 41.95 **Availability:** ✅ In Stock ## Summary > 🍺 Elevate your homebrew game with airtight precision and effortless carbonation! ## Quick Answers - **What is this?** 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?** € 41.95 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/509423192-plastic-carbonation-cap-4-pcs-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 - • **Ergonomic Grip Design:** Easily screw on/off with no slip, unlike polished finish caps. - • **Complete Leak-Proof Seal:** Upgraded flat gasket and spare O-rings ensure airtight carbonation every time. - • **Multi-Use Brewing Essential:** Perfect for carbonating, cleaning beer lines, and reviving flat growlers on the go. - • **Universal Ball Lock Keg Post:** Seamlessly connect to gas and liquid disconnects for ultimate versatility. - • **Rock-Solid 60 PSI Carbonation:** Keep your brews perfectly fizzy overnight without a single leak. ## Overview The MRbrew Plastic Carbonation Cap is a premium, leak-proof keg post designed for 2L PET bottles, supporting up to 60 PSI carbonation pressure. Featuring a unique ball lock keg post and 5/16'' beer line nipple barb, it offers versatile connectivity for gas and liquid lines. Its upgraded flat gasket and spare sealing O-rings guarantee airtight seals, making it ideal for homebrewing, soda carbonation, and efficient beer line cleaning. Lightweight and easy to grip, this cap is a must-have for millennial brewers seeking convenience and professional-grade performance. ## Description MRbrew Commercial Quality and Dependability Healthy Plastic Brewing Carbonation Cap Saves the use of an extra keg or co2 to clean out Perform better in terms of keeping sealing gasket in place 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 Package 4* Carbonation cap 16* Spare sealing o-rings gaskets Review: Perfect - Brilliant universal replacements Great job Review: Works - Works well ## 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 | 588,418 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 70 in Kegging Tools | | Brand | MRbrew | | Colour | Red | | Customer Reviews | 4.5 4.5 out of 5 stars (119) | | Date First Available | 4 Nov. 2022 | | Item Weight | 75 g | | Material | Plastic | | Model Number | MRbrew | | Package Dimensions | 16.9 x 10.7 x 3.7 cm; 75 g | ## Images ![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 ### ⭐⭐⭐⭐⭐ Perfect *by S***E on 12 November 2025* Brilliant universal replacements Great job ### ⭐⭐⭐⭐ Works *by A***) on 12 January 2026* Works well ### ⭐ Useless *by S***I on 27 December 2025* All caps leak. Unable to hold/ retain pressure. ## 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 - Dbgogo 5 Feet Ball Lock Disconnect Gas Tubing Line Stainless Steel Carbonation Cap Kit for Soda Beer PET Bottle CO2 Regulator Keg Tap with Stainless O.D 5/16'' Barb Brewing Hose Clamp Sealing Gasket - Steve Spangler's 1 Liter Soda Bottles - 6 Pack - for Science Experiment Use --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.it/products/509423192-plastic-carbonation-cap-4-pcs-ball-lock-keg-post-5](https://www.desertcart.it/products/509423192-plastic-carbonation-cap-4-pcs-ball-lock-keg-post-5) --- *Product available on Desertcart Italy* *Store origin: IT* *Last updated: 2026-04-23*