2" city main to GPM

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by steveleewonder, Mar 8, 2009.

  1. steveleewonder

    steveleewonder New Member

    2" water supply line with 50psi from city main to building, how much volume of water it flows, IOW, how much GPM this line produce under 50psi?
    and same pipe with 40psi and 60psi, how much GPM? thanks
  2. SewerRatz

    SewerRatz Illinois Licensed Plumber

    Chicago, IL
    I assume its 2" copper. The good folks at copper.org have a Calculator and handbook for 5 bucks. I used to have this handy but lent it out and never got it back. Here is the link to all their resources. The one you are looking for is A4005: Copper Tube Sizing Calculator and Handbook
  3. hj

    hj Moderator & Master Plumber Staff Member

    Cave Creek, Arizona

    The length of the pipe is also critical to make that measurement.
  4. nhmaster

    nhmaster Master Plumber

    S. Maine
    All of the plumbing code books have this information in them.
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