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rule of thumb

ross_5
ross_5 Member Posts: 19
in THE MAIN WALL
What is the rule of thumb for how many gpm you would typically see in a 1" pipe on a hot water heating system? I'm guessing maybe... 8?

Comments

  • Cosmo_3
    Cosmo_3 Member Posts: 845
    answered your own question.....excellent!

    Cosmo Valavanis

    Dependable P.H.C. Inc.
  • Brad White_9
    Brad White_9 Member Posts: 2,440
    I am more conservative I guess....

    I may lose points with the air entrainment crowd, but the supply house people named a water heater after me, I think.:)

    I generally size my piping based on about 2.4 feet of head per 100 feet of pipe. Here is my "in my head" pipe sizing table:

    1/2" = 1.5 GPM

    3/4" = 3.0 GPM

    1" = 5.0 GPM

    1-1/4" = 9.0 GPM

    1-1/2" = 18 GPM

    2" = 30 GPM

    2-1/2" = 50 GPM

    3" (Big House!) 70 GPM

    Of course, you really should never "see" 8 GPM in a 1" pipe. You could lose an eye.

    :)
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