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header to mains?

newagedawn
newagedawn Member Posts: 586
in Oil Heating
hello, i have a 1 piper, 2 mains at 2 1/2" , can i run 2" to connect to the existing 2 1/2" pipe from the header or should i keep it 2 1/2 from header
"The bitter taste of a poor install lasts far longer than the JOY of the lowest price"

Comments

  • Jamie Hall
    Jamie Hall Member Posts: 24,876
    Should keep it 2 1/2"
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 16,495
    edited April 2017
    Yes as @Jamie Hall said it really should be 2 1/2". I know you won't like that answer.

    If you decide to cheat make sure too use eccentric reducers flat on the bottom. And only if you

    I wouldn't do it without checking the connected EDR against the pipe size. You may find some radiation has been removed and you can squeak by with 2"

    If you have someone good that can measure you may be able to make it up with nipples or find someone with a 2 1/2" pipe machine.

    Some supply houses can cut and thread or (here comes the incoming fire) find a welder

    what size is your header??
  • Steamhead
    Steamhead Member Posts: 17,387
    Just use pre-cut nipples, as we do.

    What boiler are you installing?
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
    SeanBeans
  • newagedawn
    newagedawn Member Posts: 586
    peerless ec-03 with a 3 inch header and 2 inch equalizer, just wondering if i can run the mains from the header 2" to connect to the 2 1/2 mains that exist
    "The bitter taste of a poor install lasts far longer than the JOY of the lowest price"
  • Jamie Hall
    Jamie Hall Member Posts: 24,876
    You can... but it won't work as well as it should and could. 2 1/2" isn't that much harder to do, and will work a lot better.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    KC_Jonesnewagedawn
  • Danny Scully
    Danny Scully Member Posts: 1,440
    What is the connected radiation of each main?

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