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    Wren76's Avatar
    Wren76 Posts: 1, Reputation: 1
    New Member
     
    #1

    Nov 12, 2015, 02:22 PM
    How to tighten an expansion plug to seal toilet floor drain
    I just purchased a 3 inch diameter mechanical test plug (expansion plug) in order to "permanently" seal a toilet drain in my basement. The true diameter of the drain pipe seems to be 3 and 1/8 inches however and so I can't seem to hand tighten the wingnut sufficiently to seal it off tightly; it lifts right out. What am I doing wrong? Should I use a wrench to tighten it?
    Milo Dolezal's Avatar
    Milo Dolezal Posts: 7,192, Reputation: 523
    Plumbing Expert
     
    #2

    Nov 12, 2015, 08:44 PM
    You don't have the power in your bare hand to tighten the plug to make a positive seal. Place the plug inside the toilet pipe, tighten by hand as much as you can - than take pliers and keep turning the wing nut until it is tightly against the wall of the pipe.

    Hope that explains

    Milo

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