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    procrastinator's Avatar
    procrastinator Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Aug 2, 2008, 07:21 AM
    Venting a basement bathroom with a sewage pump
    Good day, All

    I am trying to figure out the venting for my basement bathroom.
    I am running a 4" waste drain from the toilet to my sewage holding tank, (one of those inground ones with a pump)which takes a 3" vent.
    I will also tie in a shower (2") and a sink (1.5 or 2")to the 4" main drain.
    Do i have to vent each individually?
    I have an existing 2" dry vent (or wet vent depending where I tie in to it). Not too far away.
    Is this sufficient for all three fixtures (toilet, sink and shower) or do I need a larger vent?

    Im in Ontario, Canada by the way.

    Thanks for your input.

    Rob
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #2

    Aug 2, 2008, 01:44 PM
    I will also tie in a shower (2") and a sink (1.5 or 2")to the 4" main drain. Do I have to vent each individually?
    Not if you connect the toilet to the main drain and the lavatory drain to the toilet branch and run a vent off the lavatory. The shower wi8ll connect to the lavatory drain line and be wet vented by it. Wet vents are code in 90% of the nation. Check code to see if you're in the excluded 10%.
    I have an existing 2" dry vent (or wet vent depending where I tie in to it). Not too far away. Is this sufficient for all three fixtures (toilet, sink and shower) or do I need a larger vent?
    Come of the lavatory with 2" and revent back to the existing dry vent and you'll be just fine. Good luck, Tom
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