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Hot Water Heat Question

Mark N
Mark N Member Posts: 1,144
in THE MAIN WALL

Can you run a hot water heat system with the water turned off at the main for a week or 2 if you're away?

Thanks

Comments

  • pecmsg
    pecmsg Member Posts: 6,074

    as long as it doesn’t leak!


    i wouldnt

  • Mark N
    Mark N Member Posts: 1,144

    Thanks that's what I was thinking

  • GroundUp
    GroundUp Member Posts: 2,349

    A closed loop system should never need water once it's established, so unless you have a terrible leak (which is a much larger issue), there is no harm in running the system with domestic water turned off. I have hundreds of systems installed out there with no connection to the domestic water at all.

  • hot_rod
    hot_rod Member Posts: 25,073

    Needs to have a backflow device, turn off the supply to the boiler

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Jamie Hall
    Jamie Hall Member Posts: 26,005

    Yes — assuming that there is a low water cutoff on the boiler.

    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    MikeAmann
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 17,776

    Most glycol systems are just a water an antifreeze system. All the ones I installed had no city water connected for make up and no glycol make up system. And I am talking systems with 6" pipe and larger.

    We had emergency valve so you could fill the system with water and dilute the glycol only by intentionally attaching a hose in two places.

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