Quote:
Originally Posted by thinkxingu
What I would NOT do is get into shutoff valves—if by chance the heater runs without enough water, your WH element is junk.
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If the shutoff valves on the water heater are open, then I'm drawing water from the COLD water heater for the shower. Legionnaire's bacteria is spread by aerosol when it comes out of the shower head.
Under what circumstances would the water heater lose water? Does it depend on pressure from the town water inlet? Like when the town water pipe freezes, the water in the boiler backflows? That has happened to me twice (frozen pipe at the road and cracked water main down the street). Scary.