SPRAGUE b-31R NATURAL GAS REGULATOR

Discussion in 'Boiler Forum' started by reevesjo, Oct 4, 2011.

  1. reevesjo

    reevesjo New Member

    Messages:
    2
    Location:
    Indiana
    Newbie here, but have a problem. Doing some re-piping on a nautral gas fired boiler in a radiant heating system my dad installed 50 years ago. I am fortunate to have a gas well on the property that produces 20 psi at the well. Just inside the home is this old, old Sprague regulator 3/4" NPT fittings. I want to replace it with 1" version. I am running new 1 1/4" polyethelene from the well to the house.
    1. Do I even need a pressure regulator with this low 20# pressure? There is plenty of volume. We never run out...yet.
    2. Is this Sprague the one to use?
    3. How do I set the pressures, with a psi gauge or manometer?

    The boiler is 140,000 input; 112,000 output
    40 gallon hot water heater
    kitchen gas range
    small space heater in one room

    Thanks for any advice, Joe
  2. Tom Sawyer

    Tom Sawyer In the Trades

    Messages:
    3,078
    Location:
    Maine
    You have got to be kidding right?
  3. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,834
    Location:
    New England
    Appliances are designed for around 0.5 psi...20psi will damage things, and likely blow up the house.
  4. Tom Sawyer

    Tom Sawyer In the Trades

    Messages:
    3,078
    Location:
    Maine
    1 inch of water [4 °C] = 0.036 pound/square inch

    Nat gas appliances typically run on 7in.wc
  5. reevesjo

    reevesjo New Member

    Messages:
    2
    Location:
    Indiana
    Dead serious, not kidding.

    Thanks Tom Sawyer. 7 inch water column is what I wanted to hear (or read). I can handle it with that info.
    Joe

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