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Vapor System Upgrades

JStarJStar Member Posts: 2,752
Just wrapped up a job on a two-pipe Vapor system. Based on the sideways Illinois radiator traps and express riser / down-feed set up, it looks like a form of Illinois Vapor system. There were no other mechanical devices in the boiler room to give a solid confirmation. Haven't done much other research on it yet.

Main complaints were massive water hammer is portions of the system and uneven heating all around the house. The house is in historic Mendham, NJ, built in the mid 1700's.

We repiped the boiler header (new 5" drop-header), removed an uneccessary condensate pump, added orifice plates to all the radiators, installed a set of new vents on the return and end of main, and put in a 2-stage gas valve and Vaporstat. I also added a drip-trap to the express main for good measure. When I cut out the plug, a few cups of water came out, so that effort feels well spent.


  • JStarJStar Member Posts: 2,752

    There was still a pile of unused coal behind the wall to the left of the boiler.
  • Jamie HallJamie Hall Member Posts: 12,709
    Nice job! I still have a pile of coal in my basement... there are things its useful for, now and then.
    Br. Jamie, osb

    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England.

    Hoffman Equipped System (all original except boiler), Weil-Mclain 580, 2.75 gph Carlin, Vapourstat 0.5 -- 6.0 ounces per square inch
  • JStarJStar Member Posts: 2,752

    Nice job! I still have a pile of coal in my basement... there are things its useful for, now and then.

    Stocking stuffers?
  • SteamheadSteamhead Member Posts: 13,768
    Looking good!
    All Steamed Up, Inc.
    "Reducing our country's energy consumption, one system at a time"
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Baltimore, MD (USA) and consulting anywhere.
  • nicholas bonham-carternicholas bonham-carter Member Posts: 8,124
    Yes, what is that coal good for, besides christmastime for bad children?--NBC
  • SWEISWEI Member Posts: 7,356
    Gorton clearly owes you a thank-you note :smiley:
  • BobCBobC Member Posts: 5,101
    Perhaps a few lumps of coal for each of the burgeoning group of presidential hopefuls?

    Smith G8-3 with EZ Gas @ 90,000 BTU, Single pipe steam
    Vaporstat with a 12oz cut-out and 4oz cut-in
    3PSI gauge
  • JUGHNEJUGHNE Member Posts: 6,793
    So are there 4 #2 vents on the end of steam main return drip into the wet return........and are there 4 #2 on the dry return going into the wet return??

    Did you feel that venting all the air thru the rad inlet orifices, rather than the discharge traps (which I assume are empty) would be slower than original design?

    Do your dry returns, which I assume never see steam with the orifice system, get hot enough to close the #2's?

    How did you size the orifices, EDR X 80% maybe, but how did you select the pressure?

    I better quit before it gets to 20 questions.

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