Ferroday Stainless Carbonation Cap for PET Bottles – works on gas AND liquid posts – $9.98 Matches Cyber Monday Deal + Hands on Review

FERRODAY Stainless Steel Carbonation Cap Forced Carbonation PET Bottle Filling 5/16 Barb CO2 Coupling to Carbonate Soda Beer Stainless Steel PET Bottle Carbonation Cap + O-ring + Gasket

Stainless steel ball lock carbonation cap with barb.  Includes replacement o-ring.

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Highlighted Features
  • [Heavy Duty Stainless Carbonation Cap]: High quality stainless steel carbonation cap, well made for rust resistance and corrosion-proof. Would last for a long time in good condition. A must have equipment for homebrew Carbonation.
  • [Great for Homebrew Carbonation/ Cleaning]: This ball lock carbonation cap is most used for homemade beverage carbonation, and meanwhile it is great for cleaning beer/ soda/ water/ juice lines. Easy to set up.
  • [Easy Forced Carbonation Drinks]: Ideal for forced carbonation drinks in PET bottles. Fit for most soft drink PET bottles. Just simply attach this cap with a PET bottle and a ball-lock gas disconnect to send CO2 into the bottle for beverage carbonation. Your homemade drinks will be right ready for drinking.
  • [Food Safe Gasket/ No Leaks]: We use premium material for the gaskets and o-rings. High-resilient food safe rubber gaskets seal against the threads and give you no leak connections! We updated our package with 2 more O-rings and 1 more gasket for replacement.
  • [No Regrets Purchase]: Stainless steel made carbonation cap weighs about 3.6oz. If any leaks, please change the O-ring or Gasket with the extra ones. We are committed to offering you high-quality products as well as superior service! Please let us know if there are any problems with this Stainless Steel Carbonation Cap, we will try our best to serve you. [Lifetime technical support].



  • PET Bottles as Growlers: These are generally intended to convert 1L and 2L bottles to growlers.  Fill up a 1L or 2L PET bottle with your favorite homebrew.  Put one of these on (purge the headspace by squeezing if you want to) and then pressurize for transport.  This should help to reduce oxygen pickup and maintain carbonation levels.
  • Fine tune or rapidly carbonate beer: You can also use this cap to rapidly carbonate beer.  Same process as for transport, just set your regulator to the proper pressure and shake or agitate the PET bottle to help introduce CO2.  Or hook it up to CO2 and let it sit in you kegerator.
  • Draft Line Cleaning Projects:  I have developed three draft line cleaning projects using similar SS Caps – Build A Recirculating Draft Line Cleaning Pump | Mark II Keg and Carboy Cleaner Draft Line Cleaning Pump ConversionBuilding a Simple Ball Lock Draft Line Flushing Setup
  • Related Top Post: Fun with Carbonation Caps!

One of the questions that arises on these type of carb caps, is… does it work with both liquid and gas posts?  Some models are universal fit and some work only with gas posts.  For draft line cleaning projects to work well, at least in my opinion, the carb cap that’s used needs to be universal.  I’m happy to report that the one I received did indeed work with both liquid and ball lock posts.  Check product description for current specs.

Check out my Hands on Review of this great carb cap.

As of this posting this is on sale for $9.98. Shipping is also free to many US addresses with Prime Membership [Try Prime for Free] or a qualifying orderPrices, promotions and availability can change quickly.  Check product page for current info – More About Prices

For some pricing clarity, this matches Amazon’s Cyber Monday 2023 deal.

FERRODAY Stainless Steel Carbonation Cap Counter Pressure Bottle Filling 5/16 Barb CO2 Coupling to Carbonate Soda Beer Water Stainless Steel PET Bottle Filling Carbonation Cap & O-ring + Flat Gasket – affiliate link, note that multiple variations of this product may be available, as such a different version may appear at this link

Our Line Cleaning Builds:

Also Consider:

ball lock jumperStainless Steel Ball Lock Jumper with Food Grade Silicone O-Rings: Allows you to connect multiple ball lock runs to clean multiple lines and taps at the same time. Works with both liquid and gas QDs.  Stainless Steel Ball Lock Jumper – via Valuebrew – An easy add-on… food grade o-rings, featured in our Keg Rebuild Post

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Make sure the components you use are compatible and rated for your intended application.  Contact manufacturer with questions about suitability or a specific application.  Always read and follow manufacturer directions.

Price, promotions and availability can change quickly. Check the product page for current price, description and availability. ssprod:B01K4GGYT0:anchor

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