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    pforsyth's Avatar
    pforsyth Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Aug 17, 2007, 03:47 PM
    Down spout drainage
    What is a good slope to drain down spouts to a ditch using 4" big "o"
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #2

    Aug 18, 2007, 05:37 PM
    Give it 1/4 inch to the foot. Good luck, Tom
    Handyman2007's Avatar
    Handyman2007 Posts: 988, Reputation: 73
    Senior Member
    		  
    #3

    Jan 30, 2013, 05:14 PM
    Rule of thumb is 1/4" to every 100 feet for proper drainage. 1/4" for every foot is going to be real steep depending on the length.
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