• 0-15 Adjustable Pressure Relief Valve
  • Shown affixed to a gas ball lock fitting (not included, order item B11)
  • This shows the adjustable valve mechanism insides

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Item #: P84
Our Price: $29.99
In Stock, Will Ship On 02/20/2020.


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:
(based on 10 reviews)

Showing 1 - 5 of 10 Reviews:

Review and Rate this Item
by Jared
on 3/16/2019
from Denver
Solid product but needs instructions
The product works great, but it took me a while to figure out how it works since it didn't come with any instructions. It would be a 5 if it came with a 30 PSI gauge and instructions. 15 psi doesn't work for sours and wheat beers.
by Pat
on 2/2/2019
from Tahoe City
Just what I needed
I use this to regulate the carbonation in my kegs. It’s perfect for overcarbonated kegs. 
by Will Schmit
on 1/4/2019
from NM
I use it every week
This baby is the cat's meow.  Finished Lager in 7 days at 68F
I don't do anything to control temperature.
I use it with a gray ball lock (gas in) with flare fitting.
I oxygenate 2.75 gallons of wort by pouring it from 3 feet up into a 5 gallon ball lock keg (with 1 1/2" cut off the serving tube.  I add 1L yeast starter, close it up, and use CO2 tank to bring it up to 10PSI.  I burp it to get rid of the O2.  In 12 hours it is almost always up to 1BAR.  I fiddle with it until it is about 14PSI.  On day 5, I cold crash, and transfer under pressure to a serving keg.  My only complaint is that 1BAR is at the upper limit - I would prefer that 1BAR be in the "center" of the gauge.
by Barry Mizes
on 7/16/2018
from St. Louis, MO
Adjustable Pressure Relief Valve
I use this to do a closed pressure transfer from a unitank to a keg.  While this doesn't provide a very fine adjustment, it does get the job done of holding the pressure reasonably well at some set value.  Adjusting the set point is very easy, it just takes a few tries to get it exactly where you want it. You can probably build this for a few bucks less, but this is already assembled and pressure tested.  Money well spent.
by Ted R Adams
on 4/15/2018
from Texas
Best design out there
These are by far the best quality spunding valves. Precise adjustments!
Review and Rate this Item
5/23/2019 9:06:09 PM
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?
We can't recommend using this product for anything other beading off excess CO2 from a beer keg.
2/5/2019 1:12:14 PM
Can this be used in a water application?
No, this is designed for gas.
10/9/2018 3:35:35 PM
How do I zero out the guage?
Probably the easiest thing to do is replace the gauge.
7/26/2018 9:08:55 PM
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
Yes, you can set it to the desired pressure and it will release if the keg gets higher.
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