I posted this as a follow up to a pressure issue I'm having at a property on another thread. I would appreciate any comments on this device. If I can get approval to install a real regulator at the DCV, this one (which is on one valve) will come out. The reason I'm soliciting comments is to find out if anyone has ever used the dial device at a master valve or one at a valve for some length of time. If so, what were your results? One concern I have for the master valve application (if it would work ) is I have both sprays and rotors on that system.