Emergency Pressure Release Valve for beer tap couplers.
The law actually requires couplers to have emergency release valves like this one. The release valve has a spring assembly in it that allows gas to escape if the pressure exceeds 55lbs. There is a small ring on the side of the valve that also allows you to release gas on purpose.
If you have an older coupler without a pressure release we highly recommend discarding it and replacing it as a matter of safety.
Don’t hesitate to contact us if you have any questions about this or any other part we carry. We want to help you get your order right the first time and to keep your project underway.