My plumber told me to leave the farthest most faucet on with a fast drip to prevent the water from freezing, he says it works so I'll try it. He said that having it drip once a second might not be enough.I was just talking to my buddy, and he suggested to shut the water off at the main valve, drain cold water from all faucets, but let the tanks alone. Those tanks are pressure fed, so if there’s no pressure in the system it will just maintain the water temp in the tanks it’s set it. Does that sound reasonable?