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Thread: 2" city main to GPM

  1. #1

    Default 2" city main to GPM

    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. #2
    Illinois Licensed Plumber SewerRatz's Avatar
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    Default

    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 http://64.90.169.191/publications/pu.../plumbing.html

  3. #3
    Moderator & Master Plumber hj's Avatar
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    Default flow

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

  4. #4
    Master Plumber nhmaster's Avatar
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    All of the plumbing code books have this information in them.

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