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Location: Kansas City, Kansas
Just turn the heater control to vacation. No real advantage to shutting off the water to just the heater.
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Location: Regina Saskatchewan Canada
Do you have a check valve or back flow valve on your water main? Do you have an expansion tank on the water heater? Would it still be in service?
Blackhat
Bad experiences come from poor decisions. So do good stories.
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My parents used to do that when they closed down their vacation home. But they had to drain the system first. If the water freezes it will burst the pipes.
It does not pay if you are not going to be away for a long time. Too much effort to drain the system.
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