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

    Apr 22, 2009, 02:34 PM
    Relief Vent Requirements
    The plumbing code is boggeling me. In a single story slab on grade warehouse with long underslab waste piping runs, are relief vents required at 100' intervals?
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
    		  
    #2

    Apr 22, 2009, 03:38 PM
    Hi Rod:

    In my code book... you are not required to install relief vents unless piping over ten branch intervals in a multi. Story building.

    You are required to install a cleanout every 50 feet for 3" and smaller and every 100 feet for pipe 4" and above.

    Let me know if you have questions...

    MARK
    Milo Dolezal's Avatar
    Milo Dolezal Posts: 7,192, Reputation: 523
    Plumbing Expert
    		  
    #3

    Apr 22, 2009, 09:30 PM

    I don't think you they are "relieve vents" . I think they are Clean Outs. In my area, you are required to install Clean Out every 75' feet.
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #4

    Apr 23, 2009, 04:44 AM
    My code calls for cleanouts on a 4" building main to be 50 feet apart and 100 feet for lareger pipes. 4" house sewers shall have cleanouts installed every 75 feet and a clean out installed at every change of direction greater then 45 degrees.
    Cheers, Tom
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