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Thread: Flow rate for 1.25 inch hard copper

  1. #1
    DIY Senior Member seaneys's Avatar
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    May 2007
    Location
    Chicago Suburbs
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    192

    Talking Flow rate for 1.25 inch hard copper

    Hello,

    I live in a Chicago Bungalow. We're adding a moderate (600 sq ft) addition. I'm doing as much of the plumbing and electrical work myself (it's a nice break from the office).

    The scope of my addition officially changed this evening. I was planning on leaving the old cast iron, but decided that since I'm replacing 4 of the 7 radiators with underfloor hydronic, I should take this opportunity to remove as much of the old cast iron as possible (headroom problems).

    I'm a little concerned that I need to watch the flow rate in the new copper I'll be running between the boiler and the pumps/manifolds. Is there a good online source for max flow rate of 1.25" hard walled copper? I'd really to use one connection to the boiler to the pumps and manifolds

    This is a legitimate project. My underground DWV and underground PEX passed on the first try.

    Steve

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