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    edsel58's Avatar
    edsel58 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Mar 2, 2007, 09:39 AM
    Pipe support under slab
    Hi
    I'm doing a basement rough in.
    Just would like to know what you use to support the new pipes(4", 2" ) under the concrete slab (so they don't move) before a cement the floor back over.
    Thanks
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #2

    Mar 2, 2007, 12:55 PM
    Wire them to your re-bar or mesh.
    doug238's Avatar
    doug238 Posts: 1,560, Reputation: 62
    Ultra Member
    		  
    #3

    Mar 2, 2007, 02:29 PM
    By 'under the slab' I am guessing you are digging in dirt?
    The trenches must be very firm so the pipe does not settle and cause a belly in the pipe and not give a flow restriction. The fall on the pipes are 1/8" per foot on 3" and above and 1/4" per foot on 2" and below. The pipes should have at least 2 inches of dirt completely covering it. The risers can be affixed with duct tape to a stick of rebar or metal pipe, but don't let them be pulled so they are no longer perfectly vertical.
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