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

    Apr 20, 2010, 12:24 PM
    For stubbing a basement toilet, do I need a p-trap?
    My basement was not stubbed. I want to put in a full bathroom with sink, shower, toilet and proper venting. I know the shower and the sink will need p-trap and each will need to have vent, since they are each more than 5 feet from main and each other. I am not sure that the toilet needs a p-trap, since the toilet has a trap built in. Is this correct? If I do install a p-trap for the toilet, will it still drain correctly, or will it create a back pressure between the toilet trap and the underground trap? I do not want to mess this up and have major re-work later! Thanks.
    hkstroud's Avatar
    hkstroud Posts: 11,929, Reputation: 899
    Home Improvement & Construction Expert
    		  
    #2

    Apr 20, 2010, 03:35 PM

    You do not install traps in the line for a toilet. The trap is built into the toilet itself. Everything else gets a trap regardless of distance. It is the venting that must be with in specified distances. Tom will give you the diagram and distances I'm sure.
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #3

    Apr 20, 2010, 03:37 PM

    Correct, we have several plumbers here and maybe you would like to submit your plumbing design so they can take a peek. They can help you determine pipe sizing and slope since you probably have little experience with plumbing.
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #4

    Apr 20, 2010, 04:14 PM
    Them experts are correct. Toilet bowls have the traps built in.
    We rough in our bathrooms like this. (see image) More questions? I'm as close as a click. Tom
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