I have an outdoor tankless gas hot water heater and sometimes it doesn't heat like it should.After checking it out and talking to a shop,he said it was the pressure regulator and they could replace it.I bought the valve and ask if it was preset from the factory and all he would say is we could install for you.
Does anybody know if there preset and how to set them if there not.I hope I don't have to hire someone because the prices I got were crazy.
Any help would be great,thanks.