Backup Valve
Water heater problem?


I have two water heaters. The main water heater is Solar Powered and the backup is on propane. When there is company I need the backup but when it's myself I just need the main, so I disconnect the propane. Should I also close the valve that runs hot water from the main to backup (this hot water pipe feeds the propane heater and the house)? Or does the propane heater act as a storage device for hot water?

Your solar unit most likely has a electric element in it that senses a drop in temp so the other tank full of cold water is mixing with the solar one every time you use hot water.Close off the back up when not in use.

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