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I bought a pressure gauge today, hooked it up, and it registered beyond the 200 psi mark. I guess I should have taken into consideration that the old galvi lines I replaced with the 3/4 copper were almost completely closed off with rust. I set up 2 pressure reducing valves, and everything is...

Thanks Gary, I'm going to pick up a gauge today, as well as a Pressure Reducing Valve. Watts 25AUB-Z3 pressure reducing valve Should be used with an expansion tank.

So if the PRV is rated at 150 psi, I have somewhere around that pressure coming in? Is the reason for the medium pressure from the kitchen and shower valves due to the reduction of 3/4" to 1/2"? Thank you. Steve

T&P Valve for releasing excess pressure. I installed a takagi t-k1 on the side of my house. I ran 3/4 copper from the meter to a ball valve and then to the tankless. From the unit I installed a 150 psi PRV exactly as shown in the manual, and continued the 3/4 run to 1 shower, and to the...