Tankless Water Heater

everything you need to know about tankless water heaters

Why would cold water back flow from my hot water line when I isolate and drain my hot water heater?

I thought the isolation valve was bad so I replaced it when I replaced my hot water heater. When I turned the water back on to the house with out the hot water heater in place, cold water was coming out of the line that feeds the house. All the faucets were turned off at [...]

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