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New Vaporstat installed system pressure question

bornerborner Posts: 17Member
Hello!
I was waiting for the warm-ish weather so I didn't freeze if I messed up, so today I installed my new vaporstat and 16oz gauge.
The pressure builds up to 10-12 oz while venting the main (1 gorton #1).
After the main closes, pressure holds steady at 8-9oz while the radiators warm up. (its about 63F out / in side.. but wanted to test) All rads have new Hoffman 1A's.
That sounds high after reading everyone else's experiences.
Seems like I need more main venting, maybe another #1 (or more). Does that seem correct?
Also all my Hoffmans are set around "1" - "2" and radiators heat up pretty evenly. Can I just adjust them all up evenly, shift to "3" - "4" to keep the pressure lower?

Thanks for all your help, you guys are amazing. Also included a picture of the new set up, because I'm a little excited about it

Bret

Comments

  • FredFred Posts: 7,737Member
    How long are the mains and what diameter pipe? A Gorton #1 is very little venting unless your mains are no more than about 10 ft of 2" pipe. That's about what a Gorton #1 can effectively vent.You always want to vent the mains fast. You really can't over vent them but you reach a point of no return on your investment.
    As far as the Hoffman 1A's. A setting of #3 is about the same as a Hoffman #41 which is a slow vent. I would set most of your radiators at #3 and those that are larger rads or further away from the boiler at #4 or maybe even #5.
  • bornerborner Posts: 17Member
    Ok, that makes sense. The main is about ~23-25' of 2"
    Sounds like I need a 3-point (if you will) antler of Gorton #1s
    Thanks for your insight!
  • Jamie HallJamie Hall Posts: 10,031Member
    borner said:

    Ok, that makes sense. The main is about ~23-25' of 2"
    Sounds like I need a 3-point (if you will) antler of Gorton #1s
    Thanks for your insight!

    One Gorton #2 or a Big Mouth would do, too.
    Jamie



    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
  • bornerborner Posts: 17Member
    Big mouth, I like the sound of that. I can't seem to find them at Supply House... Is that the actual name of the vent?
  • FredFred Posts: 7,737Member
    The Barnes and Jones Big Mouth is a far better vent that the Gorton #2, In my opinion. It is all Brass construction, vents at double the capacity of the Gorton #2 and costs a little less. Here is the link:
    https://www.amazon.com/s/ref=nb_sb_noss/147-3054328-0942228?url=search-alias=aps&field-keywords=Barnes+and+Jones+Big+mouth+vent
  • SteamheadSteamhead Posts: 12,731Member
    Only problem with the Big Mouth is it doesn't close against rising water, so if something goes wrong you'll have a major leak. If your "A" dimension (height of the lowest steam-carrying pipe above the boiler's waterline) is marginal (less than 28 inches) I'd stay with the Gorton.

    And the Gorton is all-brass too.
    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.
    https://heatinghelp.com/find-a-contractor/detail/all-steamed-up-inc
  • ChrisJChrisJ Posts: 9,517Member
    Steamhead said:

    Only problem with the Big Mouth is it doesn't close against rising water, so if something goes wrong you'll have a major leak. If your "A" dimension (height of the lowest steam-carrying pipe above the boiler's waterline) is marginal (less than 28 inches) I'd stay with the Gorton.

    And the Gorton is all-brass too.

    The Gorton #2 is all brass?
    The #1s I have feel and sound like painted steel?

    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
  • JUGHNEJUGHNE Posts: 5,467Member
    Try a magnet. The G-2 I just checked is not steel. Could only feel some steel thru the case around the top.
    I would call it brass with some steel parts inside. Could be some type of stainless steel inside that can be magnetized.
  • SteamheadSteamhead Posts: 12,731Member
    Might be the seat. Some trap manufacturers did this too, since that's where most of the wear occurs.
    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.
    https://heatinghelp.com/find-a-contractor/detail/all-steamed-up-inc
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