William’s Brewing Inline Check Valve – keep things going the right way – Barb for 1/4″ tubing OR DuoTight

In Line Check Valve

Inline Check Valve via William’s Brewing

More Info

From the product description, check product page for current description, price and availability:

This inline check valve features ¼” Duotight compatible barbs, and releases at 10 PSI. Useful in draft systems that operate at dispensing pressures of 10 PSI or higher. For gas or water lines. Overall length 4¼”

To use this with the Duotight system and 8mm EvaBarrier tubing, you will need two Z84 Duotight reducers (see the above picture).


  • It is possible for beer to flow backwards through CO2 lines.  This check valve helps keep your beer out of those lines and helps to prevent dirty gas lines and QDs and a possible mess.
  • This can be used 1/4″ tubing OR with DuoTight Fittings.  If you’re using the smaller 8mm EVABarrier tubing you’ll need reducers, explained on the product page.
  • DuoTights are awesome.  Check out my extensive hands on review… Hands on Review: Kegland DuoTight Fittings & EVABarrier Tubing!


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Hands on Review: Kegland DuoTight Fittings & EVABarrier Tubing!

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