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water flowing from rads even though shutoff on supply??

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anthony_7
anthony_7 Member Posts: 72
in THE MAIN WALL
I put shutoffs on two zones supply for my rads. The valves are off and I drained the boiler down to 0. I cut rads to remove them and cold water started gushing out until I shut the main off and when I turned it on the water kept coming. And yes I confirmed the Shutoff is off. WHERE IS THE WATER COMING FROM THEN??

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  • Matt Undy
    Matt Undy Member Posts: 256
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    What about the return?

    Matt
  • anthony_7
    anthony_7 Member Posts: 72
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    no shutoff on return. IS THAT MY PROBLEM?

  • Matt Undy
    Matt Undy Member Posts: 256
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    yes

    If you open the return without caping it somehow the presure in the system will push water the other way out through the return.

    Matt
  • anthony_7
    anthony_7 Member Posts: 72
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    If I shut off sup and return will that effect the coil at all?

    Meaning I need to kill my rads for a construction project but still need h/w from my coil. Will it be ok to close sup and return line.
  • Matt Undy
    Matt Undy Member Posts: 256
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    It depends on how the system is piped, how much of the radiation capacity is removed vs. overall system size and water content.

    Anything else I'm missing everyoen else?

    Probably not a bad idea to call somone in who can understand how the system is piped and controled just to be sure you won't be short cycling the boiler or deadheading a circulator.

    Matt
  • Matt Undy
    Matt Undy Member Posts: 256
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    Wait, is this a coil for DHW and your just doing it for the summer? If so it should be fine.

    Matt
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