Discussion Starter · #1 ·
I am renovating a 1920 house! The house is a duplex and now being turned into a triplex. My next mission is the plumbing. I am using Pex. The main line will be 1" with 3/4" branches and 1/2" copper stub outs connected to compression fitting stop valves. My water pressure is around 100psi(city water). So I am going to have to install a Pressure Reducer Valve. I have been reading a lot online, and it says PRV's make it a closed system. Will I have to install expansion tanks on all 3 water heaters? Where do I install the PRV? Do I need a Back flow Preventer? If so, does that go before or after the PRV? I know I need a BFP on my sill cocks and if I am having irrigation. My city is based off the Uniform Plumbing Code. I have the IPC because the bookstore didn't have the UPC. I am just trying to make sure that I get everything lined up before I have to redo things. I have everything figured out except the dang PRV and BFP.:furious: I am sure the manufactuer has instructions or I can call the inspector but I would like to hear other opinions.