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Water leak from air vent on baseboard steam system

Water leaks from the air vent at the end of a run for my upstairs heating system. I have replaced the air vent to no avail. It still leaks and I must keep a pan underneath the valve to prevent damage to the floor. Please help!


  • Unknown
    How long and what diameter is the baseboard pipe?

    Does it have two pipes connected to it, a supply and a return?

    How mutch pitch does it have twoard the end the water drains from?

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