This PRV performs as expected. I uses these for spunding valves on the new 27L unitanks now available. I also use them on my souring barrels (corny kegs with oak chips) to prevent over-pressuring. I disassemble the spring and valve diaphragm to apply a small amount of keg lube which makes the crack (opening) pressure more reproducible due to less sticking. The standard 1/4" NTP fittings are solid and allow for inserting t-connectors hose barbs and even pressure gauges. It's very versatile.

Experimenting with different fermentation techniques. I ferment in a keg with the dip tube cut 2" short - 4.5 gallon in FV and 4.2 gallons out. Did a Special Bitter - let ferment for 3 days with blowoff then put on the valve set to 13psi. Let it rip for another 4 days transferred to serving keg carbonated and drank it on day 8. Beer was great. Trying a lager at room temp next week under 13 psi for 7 days. Valve doesn't have a gauge but it was easy to adjust to 13psi using the CO2 tank gauge.

This does what it says. I wanted the model with the gauge but it was out of stock and I was impatient. Quick tip to set pressure without the gauge: Close the valve. Set your regulator to the pressure you want. Fill the keg/vessel to the psi you want. Then pop this thing on and slowly open valve until you hear the C02 escape. Not a precise method but probably gets you within a few psi of where you want to be. Also I am sure you cam build this cheaper (even with parts from MoreBeer) but again- I'm impatient.

I have the deluxe version and the gauge is great. The pressure control is rough at best. Needle valve would work much better and I will add one to mine

Having an adjustable pressure relief valve is great for closed environment CO2 transfers and especially helpful for keg to keg transfers of carbonated beer. The adjustment to the pressure relief is fairly crude (tends to jump with little adjustments). A tighter tolerance for the threads would probably help. That said it's better than not having one and beats the hell out of the old process of pulling the pressure relief valve to stay all the way open or burping it. I wish I would have opted for the more expensive one with the gauge. My only suggestion for improvement is a tighter tolerance on the threads for the adjustment for the pressure.

I use this every time I transfer from one keg to another. Works very well and cant complain. Easy to clean.