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    grichard50's Avatar
    grichard50 Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Feb 7, 2007, 11:25 AM
    Proper venting
    Can a new bathroom, toilet, sink, and shower be vented through an existing 1 1/2" vent? The bathroom will be in the basement, and the vent is part of kitchen on the first floor. Would a 2 1/2" better, or can I use what I have if I tie into the vent above the kitchen sink ?
    Thank you... Rick
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #2

    Feb 7, 2007, 03:45 PM
    Although the inspectors prefer 2"vents the Standard Plumbing Code allows 8 fixture units to be serviced by a 1 1/2" vent. Your bathroom group,(6 fixture units) plus your kitchen sink, (2 fixture units) falls within this limit.
    Run the bathroom vent up and revent back into the kitchen vent at least 6 inches above the sinks flood rim. Good luck, Tom
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