0-15 Adjustable Pressure Relief Valve

  • Item #P84
  • Price: $29.99
  • Part #
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This adjustable pressure relief valve has a sensitivity of 0 to 15 psi. It has a 1/4" female flare fitting on one end, which attaches to any threaded ball or pin lock gas fitting. Use this to make a keg pressure relief valve. Adjust the relief pressure by turning the knob on the right side of this assembly. Also known as a Spunding Valve.

Average rating 8.18181818181818 out of 10 ( based on 11 reviews )

For what purpose?

Review by Carl on 8/8/2013

I'm digging any new product - but is this a better version of the pressure tester since I can add a some sugar and the carbonation varies when i naturally carbonate in the keg - pretty much looks slick, but can you tell us some uses? William's responds: Use it as an adjustable pressure relief valve when carbonating, with the added feature of a pressure monitor gauge.

Great Idea - can easily be improved

Review by Russ on 10/9/2014

I bought one of these relief valves for natural carbonating etc. It works great for measuring the pressure in the secondary before pushing to the serving tank. However, I am not so sure it works as well to maintain a precise CO2 pressure for carbonation. I think the product could be dramatically improved if the threading on the pressure relief valve was finer. It is a very coarse thread that is difficult to dial in to the target pressure.

Great for Pressure fermentation!

Review by Leslie on 3/18/2017

Works very well for fermenting under pressure and controlling pressure for self carbonation. Easy to use and check keg pressure at any time.

Multiple uses

Review by Bill T on 3/25/2017

I bought two of these and am very happy with them. I use them for pressure fermentation, for properly carbonating my kegs, and for checking my keezer and kegs for those tiny CO2 leaks that dish soap or star-san can't find. The screw adjustment mechanism is a bit crude for fine adjustment, but I can get within my target range when pressure fermenting. The cost is very reasonable, as I built one previously and the parts cost as much as this pre-assembled one from Williams.


Review by Stubby the Runner on 9/9/2017

Bought two. Both leaked. William's Brewing Responds: We shipped some of these without thread sealant between the ¼" flare and ¼" NPT fitting. We have corrected all of ours in stock thanks to you. We also appreciate sealing the two you received without proper thread sealant.

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May 23, 2019 by Jf

Q: Can this relief valve be used as part of a low pressure air inflating system for the purpose of limiting the maximum pressure in the system while using a high pressure input device?

A: We can't recommend using this product for anything other beading off excess CO2 from a beer keg.

Feb 05, 2019 by Matthew

Q: Can this be used in a water application?

A: No, this is designed for gas.

Oct 09, 2018 by JOSEPH A Limata

Q: How do I zero out the guage?

A: Probably the easiest thing to do is replace the gauge.

Jul 26, 2018 by Tank

Q: I would like to use this to keep a constant pressure of say, 8 pounds, on my keg for dispensing. Would this do the trick? Thanks

A: Yes, you can set it to the desired pressure and it will release if the keg gets higher.

Dec 14, 2017 by Reggie

Q: Does this device automatically release pressure or do you have to manually release

A: You adjust a spring tension valve to release pressure automatically.

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