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    FishFinsHeat's Avatar
    FishFinsHeat Posts: 9, Reputation: 1
    New Member
    		  
    #1

    Sep 11, 2008, 05:46 PM
    Ductile Iron Pipe
    Why does ductile iron pipe come in 21 foot lengths? I know that 21' is a standardized Irish "perch", but I don't know why they use that for lengths of ductile iron pipe. I am just curious...
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #2

    Sep 12, 2008, 05:49 AM
    I don't know what a " Irish Perch" is, (would that be a fish with a Irish brogue?) but since Galvanized and Black Iron pipe all come in 21 feet lengths I guess they figured 21 feet would be OK for ductile iron pipe as well. Regards, Tom
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