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Thread: SPRAGUE b-31R NATURAL GAS REGULATOR

  1. #1
    DIY Junior Member reevesjo's Avatar
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    Default SPRAGUE b-31R NATURAL GAS REGULATOR

    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. #2
    In the Trades Tom Sawyer's Avatar
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    You have got to be kidding right?
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

  3. #3
    Retired Defense Industry Engineer jadnashua's Avatar
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    Default

    Appliances are designed for around 0.5 psi...20psi will damage things, and likely blow up the house.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  4. #4
    In the Trades Tom Sawyer's Avatar
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    1 inch of water [4 C] = 0.036 pound/square inch

    Nat gas appliances typically run on 7in.wc
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

  5. #5
    DIY Junior Member reevesjo's Avatar
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    Default 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

    Quote Originally Posted by Tom Sawyer View Post
    1 inch of water [4 C] = 0.036 pound/square inch

    Nat gas appliances typically run on 7in.wc

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