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VENT ON SHORT MAIN?

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PROTO718
PROTO718 Member Posts: 4
in Strictly Steam
Hello Gents. I have a question regarding my one pipe parallel flow heating system with a wet return. The boiler is situated in the rear of my basement in a 2 story building. I have 2 mains. One main has a 40 foot run and heads towards the front of the building. The second main is only 4 1/2 feet starting from the top of the riser and ending at the point when the pipe heads upstairs. Do I need a main vent installed on the 4 1/2 main?? I have a main vent at the end of the 40' main. I posted the pic of the short main. Is there a down side on having a short run on a main? Thanks.

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  • BobC
    BobC Member Posts: 5,478
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    That main

    can probably be vented through the radiator that it feeds unless you are having problems with it that indicate a venting problem. It may take a larger vent than other radiators on the system.



    In your picture it looks like the boiler header just stops, it should drop down to the boiler return port to meet the hartford loop. Hopefully it just appears that way because of the angle the photo was taken.



    Bob
    Smith G8-3 with EZ Gas @ 90,000 BTU, Single pipe steam
    Vaporstat with a 12oz cut-out and 4oz cut-in
    3PSI gauge
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