We were seasonal for three years as owners of our current home. We were gone nine months each year and kept the 40 gallon hot water heater on "vacation". We always turned of the main water to the house at the valve in the garage. We do this same routine even if we are away for a few days.
Oh....and if you have a hot water re-cirulation pump, turn that OFF before turning off the main water. We ruined one Watts pump by not doing that. It was explained to us by the plumber that the Watts pump needs water to "lubricate" it. Turning off the main water burned out the pump. Live and learn.
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