Bathtub Drain Assembly Install When No Access?

Discussion in 'Shower & Bathtub Forum & Blog' started by thebigsee, Jan 26, 2010.

  1. thebigsee

    thebigsee DIY Member

    Sep 24, 2009
    Southern California
    I'm putting in a new tub and there is virtually no access to the underside/back parts of the tub once it's in place (my house is on a slab and there's a furnace right next to the front part of the tub).

    How do I install the drain assembly? All the instructions say to put it on the tub, then lower the tub into position, but then I'd be blindly connecting to the drain without any way to secure it with a compression fitting.

  2. Andrew21

    Andrew21 Member

    Jun 21, 2006
    New York
    Interesting. I'm not sure if you can do it with a compression fitting but my plumber did it this way.

    We had no access either from underneath. He measured, measured and measured the entire bath drain assembly. Soldered it on and then lowered the tub in. He did it and I was amazed. I was able to lift the plywood from under the floor but it was about 3 feet away. We filled the tub and watched it drain from the panel. I looked at the connections and didn't see any water leaking.

    Hope this helps.
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  4. johnjh2o1

    johnjh2o1 Plumbing Contractor for 49 years

    Aug 9, 2009
    You must install the trap & trip waste first and then set the tub onto them . It takes some careful measurements.

  5. thebigsee

    thebigsee DIY Member

    Sep 24, 2009
    Southern California
    Can I use compression fittings at all since it will be inaccessible? Or does it all have to be glued?
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