Use CO2 Produced by Fermentation to Purge Serving Kegs, Carboys & Fermenters

Use CO2 Produced by Fermentation to Purge Serving Kegs, Carboys & Fermenters

A Spunding Valve allows you to maintain a set pressure. If pressure in the vessel exceeds the set point, it is expelled. It generally consists of an adjustable PRV valve, a tee, a gauge and a way to connect to your keg.


Why a Spunding Valve?

There are loads of homebrew related applications for a Spunding valve ranging from pressurized ferementation to naturally carbonating to fixing over carbonated beers and lots more.  Check out our resource post on the subject.  It’s arguably the go-to resource on the Internet on the subject

Use CO2 Produced by Fermentation to Purge Serving Kegs, Carboys & Fermenters

This technique requires a BlowTie Spunding Valve.  Since the the BlowTie has a defined output port, you can use it to capture CO2 produced by fermentation.  The “out” side of the BlowTie is a DuoTight connection, just like the “in” side.  Use compatible EVABarrier tubing and fittings and you can route outgoing CO2 wherever you’d like.  The primary application I can think of for using this is to purge kegs, carboys and fermenters.  The pictured setup shows a 10 gallon keg converted to a fermenter.  The “out” side of the BlowTie is connected to the liquid out side of an empty keg.  That allows incoming CO2 to purge the keg from bottom to top.  The lid PRV valve for the receiving keg is open to allow pressure to vent.  Of course you could tee the “out” side and flush multiple kegs or vessels using the CO2 produced by a single fermenter.

Related: Hands on Review: Kegland DuoTight Fittings & EVABarrier Tubing!

This write-up is part of my Spunding Valve Resource Post – Jump To This Section

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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. top:spundingvalvelnksto lnksto:spundingvalve rp:lnksspundpurge

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