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    cardomb's Avatar
    cardomb Posts: 11, Reputation: 1
    New Member
    		  
    #1

    Jan 2, 2008, 08:11 PM
    Copper piping pressure
    I am not sure if this is the correct forum to ask this question therefore if anyone can assist or direct me to the correct forum, I would appreciate it. My question is about running piping for an air compressor. I have a 135 PSI compressor and need to run pipe about 70 feet from the compressor. I will probably use copper piping, but do not know what type to use (type l vs M). I also would like some input on pressure drop over 70 feet and whether I should use 3/4 inch vs 1/2. Copper is expensive therefore I would probably go with the 1/2 inch but if it will not be adequate, than 3/4. I will use the compressor for air tools (ratch, impact wrench, chisel); one tool at a time.
    iamgrowler's Avatar
    iamgrowler Posts: 1,421, Reputation: 110
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    #2

    Jan 2, 2008, 08:27 PM
    I wouldn't recommend using such thin-walled material for compressed air.

    Personally, I would use threaded black iron pipe and fittings, graded back towards the compressor and with drip legs installed at the bottom of any long vertical runs.
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