Control Devices Adjustable Pressure Relief Valve [0 to 100 PSI] + Building a Spunding Valve

Control Devices - CR25-100 -CR25 CR Series Brass Pressure Relief Valve, 0-100 psi Adjustable Pressure Range, 1/4" Male NPT

Control Devices Adjustable Pressure Relief Valve, 0-100 PSI, 1/4″ Male NPT

More Info
Highlighted Features
  • Relief pressure adjustable from 0 to 100 psi
  • 1/4" male NPT threaded inlet connection
  • Brass construction and stainless steel spring for corrosion resistance
  • Silicon O-ring provides leak-proof seal to within 10 percent of set pressure
  • Micrometer-style nylon knob for pressure relief adjustment


This valve is the heart of my Spunding Valve Build.  It is a manually adjustable pressure relief valve.  Adjustable from 0 to 100 PSI.  I’ve found the pressure markings on this to be difficult to use/possibly inaccurate.  My Spunding Build accounts for this via a pressure gauge.  There is no homebrewing-related situation I’m aware of that would have you at 100 PSI.  Generally you’d be at or below 30 PSI.  As always, you’ll want to ensure that all components in your system (kegs, tubing, etc) are rated for your desired pressure.

What are others saying?  Search this product’s Amazon reviews for “homebrew” – may include reviews for other sizes or variations

Control Devices – CR25-100 -CR25 CR Series Brass Pressure Relief Valve, 0-100 psi Adjustable Pressure Range, 1/4″ Male NPT – note that multiple variations of this product may be available, as such a different version may appear at this link

Is this accurate??

Ove time I’ve received this question several times.

I take it to mean, is the scale that’s printed on the side of this PRV accurate?

My answer is… It doesn’t really matter. Whether or not it’s accurate or not doesn’t really matter as far as I’m concerned. For my purposes the scale doesn’t offer the granularity needed for my application. This is the reason that my Spunding Builds include pressure gauges. A gauge offers far more precision (some up to .1 PSI) and control.

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. tag:itsapageamz prod:B007GDY3CU

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