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Buffer tank

Jwil348 Member Posts: 1
Need help! I would like to turn my old 40 gallon electric water heater into a buffer tank. Is there any diagrams on how to do that? Thanks for the help


  • Ironman
    Ironman Member Posts: 7,387
    edited January 2019
    Remove the drain valve and put a Tee there for the inlet. Use the hot for the outlet after removing any plastic check or dip tube. Cap the cold.

    Whether you pipe it in series or use closely spaced Tees to inject into the supply or return depends upon how the rest of your system is designed and sized.

    I wouldn't use an old tank. You're cheaping out on something that's not that expensive and that could effect the rest of the system adversely.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • hot_rod
    hot_rod Member Posts: 22,387
    tell us a bit more about the project. What type of boiler, Size of smallest zone.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream