is never a good thing to wake up to a 230AM...apparently my PRV activated and I've had to shut off the water to my house...

At what pressure do you run your water?

street pressure is about 95 pounds from what I've been told...something caused it to trigger

When I had my water heater replaced - plumber had to add a regulator on the main to the house and expansion tank at the heater - code now.

City pressure near 100 psi - code puts it <70

I put PRVs in commercial buildings that do not have outlets on them. Thank God!

The Watts 25AUB-Z3 Pressure Reducing Valve, ¾" is the one I use. No discharge, just a pressure reducer.

Back flow devices, those have an outlet to which you cannot attach a closed pipe. And when they blow, watch out.

this is on my primary water service - I have two PRV's on my water heater - due to the design of my house, it is not near an exterior wall so the discharge pipe runs to a floor pan - I have assumed the risk of it not venting to the exterior

apparently that's relatively common around here

the plumber arrived about 8AM this morning, about an hour away from having water again...