100K Boiler through 1" pipe?

SIERRADMAX Posted By SIERRADMAX, Nov 20, 2012 at 10:15 AM

  1. SIERRADMAX

    SIERRADMAX
    Feeling the Heat 2.
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    Jan 13, 2011
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    Loc:
    RI
    I'll be plumbing an econoburn 100 to my existing supply/return headers off my oil boiler. However, these headers are 1" sch. 40 with 3/4" zone lines. The headers themselves are about 16" in length and I'll be adding a piece to loop the headers together to make the primary loop for the econoburn. I see many diagrams using 1-1/4" for the primary loop. In addition, after doing some research, 1" is good for about 70k+/- BTU/Hr. Should I replumb the supply/return for a complete 1-1/4" loop?
     
  2. stee6043

    stee6043
    Minister of Fire 2.
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    Aug 22, 2008
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    I personally would prefer 1-1/4" on the primary loop. I don't think you'll regret it especially if there is a chance you'll add any new loads in the future.
     
  3. flyingcow

    flyingcow
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    Jun 4, 2008
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    Also, measure the I.D. I've seen inch and 1/4 pex actually be closer to 1 inch ID.
     
  4. BoilerMan

    BoilerMan
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    Apr 16, 2012
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    Right, if it's type M copper, 1" is fine. If it's pex, then 1-1/4" is what is needed. This is a small run, and 1" copper is good for 10gpm, in a 20F delt world this is 100Mbtu.

    TS
     
  5. SIERRADMAX

    SIERRADMAX
    Feeling the Heat 2.
    NULL
    

    Jan 13, 2011
    300
    25
    Loc:
    RI
    Sorry... I should have been more clear! Both headers are steel.
     
  6. mikefrommaine

    mikefrommaine
    Guest 2.
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    The headers should be fine. But I would use 1.25 for the near boiler piping until you get to where you can add in tees for future storage.
     
    flyingcow likes this.

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