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Closed hot water system

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Ron Schroeder
Ron Schroeder Member Posts: 995
Oxygen coming out of the water and air pockets out of the system and out the vents needs to be replenished

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  • Scott Jaskiewicz
    Scott Jaskiewicz Member Posts: 1
    Closed water heating system

    Why should a closed loop water boiler system be connected to a water supply after initial fill, if there are no leaks in the piping. Where dose the water go?
  • Al Letellier_9
    Al Letellier_9 Member Posts: 929
    where does the water go

    It doesn't go anywhere, if there are no leaks. The autofill is there to maintain constant system pressure and to refill the boiler in the case of a leak or safety valve discharge. There is a school of thought that says to shut off the water supply after system start up, but you must have a low water cutoff that is operational and well maintain to leave the water off.

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