Pressure Relief Valve for Ball Lock Cornelius Kegs Ball Lock Cornelius Style Lid Stainless Steel Pressure Relief Valve 4 Pack by MRbrew (Pressure Valve)

These were machined well and have a quality feel/look. I recently purchased a dozen ball lock kegs to convert my sour beer program from using glass carboys. I changed all the o-rings and replaced the original PRVs with these. Stainless should be easy to sanitize with boiling water. Also, metal threads should not cross like the plastic threads can when screwing into the keg lid. I ordered spare o-rings from McMaster Carr for future cleaning (Oil-Resistant Buna-N O-Ring; 1/16 Fractional Width, Dash Number 008, ID 3/16", OD 5/16")

I had to get these in a pinch when one of me kegs leaked an entire tank of CO2. I got these in a pinch to repair the old prv on a couple if my existing kegs. With a little teflon tape to ensure a good seal, these have worked flawlessly. The stainless steel construction makes it easier to crank down (not too hard, of course!) on the valves without having to worry about damaging the threads or the seal to the keg lid. Definitely worth the upgrade and its nice to have a couple extra on hand for any future mishaps.

I need to disassemble and stretch each spring out to increase pressure, they all opened at about 30psi

Nicely made-replaced my old leaking ones.

I have many kegs and some have broken pressure relief valves. This was a no brainer. Great quality from Mr. Beer