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Main Air Vents

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Bob Sutton
Bob Sutton Member Posts: 2
in THE MAIN WALL
School in Maine. 1963 vintage, has 28 hot water heating main air vent "traps" called out on plans. Model No. W13 is given. All hot water heating main vent traps are then piped back to a common drip header in a Janitor Closet sink. What are these? Are they automatic air vents or manual. I can't find a W13 listed anywhere. Anyone come acros this before?
Bob

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  • Bob Sutton
    Bob Sutton Member Posts: 2
    Main Air Vents

    School in Maine. 1963 vintage, has 28 hot water heating main air vent "traps" called out on plans. Model No. W13 is given. All hot water heating main vent traps are then piped back to a common drip header in a Janitor Closet sink. What are these? Are they automatic air vents or manual. I can't find a W13 listed anywhere. Anyone come acros this before?
    Bob
  • Michal
    Michal Member Posts: 213
    you are correct

    you are correct
    these are automatic air vents which are piped to a common drain line/header. last I recalled I think they were b&g. I would call the engineer and ask him where he got the number if I were you
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