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Up close image of the DuoTight KL20435, Quick Disconnect Carbonation adapter for BrewBuilt Flex Chambers

Stainless Steel Ball Lock Cap – for Carbonation, Cleaning & FermZilla

by Kegland
$15.49 - $15.49
$15.49
$15.49 - $15.49
$15.49

Stainless Steel Ball Lock Cap – Durable PET Bottle Adapter for Pressure, Cleaning, or Dispensing

Compatible with Gas or Liquid Disconnects for Long-Lasting Utility

Upgrade your portable kegging and cleaning setup with this high-quality stainless steel ball lock cap featuring 28mm PCO 1881 soda bottle threads. Built to last and easy to sanitize, this cap allows you to convert a standard 1- or 2-liter PET soda bottle into a rugged and reusable carbonation vessel, line cleaner, or pressure-ready serving bottle.

Designed for use with both gas and liquid ball lock disconnects, it’s a versatile tool for any draft system. Use it to charge bottles with CO₂, push cleaning solution through your lines, or dispense beer on the go. It's also Duotight compatible with 6.5 mm OD tubing and can be easily integrated into EVABarrier line systems with the right adapter.

Compatible With FermZilla & BrewBuilt Systems

This stainless cap is a drop-in fit for the FermZilla Collection Container and BrewBuilt Flex Chamber. Use it to purge oxygen before dry hopping, apply top pressure, or oxygenate your wort through the collection port using a diffusion stone and tubing.

Common Uses:

  • Portable Carbonation: Pre-charge soda bottles with CO₂ for draft-style service on the go
  • Draft Line Cleaning: Fill a soda bottle with cleaner and flush lines by squeezing or pressurizing
  • FermZilla or BrewBuilt Integration: Purge oxygen or oxygenate wort through compatible collection chambers
  • Durability Upgrade: Stainless body disassembles for easy cleaning and withstands repeated use

Specifications:

  • Material: 304 Stainless Steel
  • Thread Type: 28mm PCO 1881 (standard soda bottle threads)
  • Ball Lock Type: Compatible with gas and liquid disconnects
  • Tubing Compatibility: 6.5mm Duotight-compatible barb
  • Design: Fully disassemblable for easy cleaning and sanitation

Looking for a color-coded plastic version? Check out our red plastic cap for liquid lines or yellow plastic cap for gas lines.