Review on Control Devices Non Code Adjustable Pressure by Brenda Joiner

No problem here! The package contains instructions explaining which spring to use for my application i.e. H. The tankless onboard air compressor in my truck. I installed it between my compressor and the quick connector (via a tee) so that if I accidentally disconnected the hose from the tire the hose wouldn't burst and damage the compressor. Easily "calibrated" with the pressure gauge on the compressor and easy to set up. I just used a 51-100psi red spring and adjusted it to 80psi. It kept popping up. It makes a decent sound when it opens (probably sounds like a gunshot to strangers). I was hoping it would be thinner but it works.