Expansion tank on electric water heater?

Discussion in 'Water Heater Forum, Tanks' started by ShockHazard, Mar 2, 2013.

  1. ShockHazard

    ShockHazard New Member

    Nov 1, 2012
    Independent Contractor
    North East Pennsylvania
    Ran into a basic electric water heater system, built in the last decade, with a boiler sized expansion tank on the hot side.

    Any idea why? The only guess I have is the heater being on a timer or such, where it goes from stone cold to hot, but even that seems unneccesary.

    I'd have to guess it was built this way.
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