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

    Jun 19, 2010, 08:04 AM
    Water backs up in downstairs bathtub when upstairs shower is used. How do I fix the p
    I have up and down full bathrooms right above each other. When I use the upstairs shower, I get water in the downstairs tub. What do I do?
    Milo Dolezal's Avatar
    Milo Dolezal Posts: 7,192, Reputation: 523
    Plumbing Expert
     
    #2

    Jun 19, 2010, 09:03 AM

    That indicates you have blockage in common drain somewhere between downstairs bathroom and where it connects to main sewer pipe. You have to snake it...
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
     
    #3

    Jun 20, 2010, 08:03 AM
    you have blockage in common drain somewhere between downstairs bathroom and where it connects to main sewer pipe. You have to snake it...
    Great advice from Milo. And you do it like this.
    Unscrew and remove the overflow plate,(The one with the drain lever) and pull out the tub stopper. You now have a clear shot at the trap. The way you were going in through the drain it ran you square into a tee that you can't get around. Now feed the cable( 1/4" best or 3/3" with a small tip. You can rent a Ridgid K50 sink cable.) About 2' down you will run into the bend of the trap. Crank and push at the same time to work around it. Your blockage will be found in the lateral pipe going to the stack. You shouldn't have to put out more then 10 or 12 feet. I have found tub and shower clogs to be mostly hair and the worm should auger into it and pull it back. After you snake pour a few pans of boiling water down the drain. This will loosen the grease and flush the mess out into the main. Hope this helps and thank you for rating my reply. TOM
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