Watts 0371271 530C 1/2" Poppet Style Adjustable Relief Valve

Pressure relief on hot water system. The last like this lasted over twenty years but is now leaking slightly. Good service life

Ease-of-use

Easy to install and setup

Was going to use as a coolant bypass on my 06 cummins as this was suggested by a few fellow cummins owners but it arrived with damage that I believe would leak so didnt waste my time installing it.

Used for a coolant bypass on my 04 cummins. Wish they were cheaper but works great. So far so good.

Used to replace a 75lb pressure relief valve installed by Ryland Homes, on a county water line, that a county employee told me gets up to 100 PSI. Every other time I ran the Rainbird system, the old valve on the main from the street would open and not shut. If I was away the water ran out into the street. You would think a neighbor might come over and shut it off, it is outside on the house, or ring the bell. I got a $580.00 water bill one month. Tampa, Hillsborough County, FL. Moreover, the old valve would not close again, until you shut the main off and turned it back on.This one I set at 105 PSI and it has not opened once. I think I might turn it lower, until it does open and see if it closes on its own, once excess pressure is released by it. I have not done that yet.

It’s great ,nice adjustment knob.But it just a few dollars too much.

Used this valve for my coolant bypass on my 05 Cummins. Works like a charm!