Upgrading Propane Water Heater to Electric, can I keep propane as backup?

Discussion in 'Water Heater Forum, Tanks' started by Lanexa, Mar 17, 2013.

  1. Lanexa

    Lanexa New Member

    Mar 17, 2013
    Lanexa, NY
    Good Day,

    I am purchasing a home that has a propane hot water heater, which for purely economic reasons, I am going to replace with an electric heater. Has anyone ever kept the propane heater installed for use as a backup? There is nothing wrong with the propane heater, it is only a few years old, it just cost about twice as much in our area to heat hot water with propane as compared to electric. There is plenty of room in the garage to place a new electric heater next to the current propane one. What are the drawbacks to my idea? Thanks!

  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    It should work. When you have the new electric tank installed, you may want to also plumb in bypass valves so that one or the other could be removed without losing the use of hot water at all. You may find that if you have a lot of company over, you may want to turn the propane one back on. Plumb them in series, with the propane one first in line from the supply. Having the water run through it would keep the water from becoming stagnant, and in the summer, would temper the ground water up to the garage temp and lessen the load on it. Might make it worse in the winter, though. Running them both would provide lots more hot water, should your needs be there occasionally.
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