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Purge Hydronic Heating System

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alex081291
alex081291 Member Posts: 2
in Gas Heating
Can someone help me figure out where to purge my system from exactly. I’ve looked at diagrams and I can’t quite make out where I should purge from. Initially my thought was the three ball valves on the right of the picture but that doesn’t seem to make sense. Would truly appreciate the help

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  • HVACNUT
    HVACNUT Member Posts: 5,833
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    Go with your original thought. 
    Do each one separately. Zone valves must be open.
    Connect drain hose.
    Close ball valve.
    Open drain valve. 
  • alex081291
    alex081291 Member Posts: 2
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    Hi, can you comment on the two purge valves below the water heater— do I purge from there? Open them? Keep them closed?

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