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Thread: Set cast iron tub in mud??

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  1. #1
    DIY Junior Member
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    Default Set cast iron tub in mud??

    We are remodeling our 2nd floor bathroom and have purchased a 72" Toto cast iron tub. The tub will be placed in the corner of the room and our carpenter has built a surround and a plywood base. The subfloor is in good condition.

    Our plumber intends to place the tub in a bed of cement mud but I have heard it's better to place shims under the feet instead. What would you recommend? I appreciate if several of you experts can respond as I need to get advice quickly. The tub goes in on Monday!

    Thanks!

  2. #2
    Plumbing Contractor for 49 years johnjh2o1's Avatar
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    If the tub has legs that's what I would support it by.

    John

  3. #3
    DIY Junior Member Grimace's Avatar
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    I would think that the mud would help distribute the weight over a larger area.

  4. #4
    Plumbing Contractor for 49 years johnjh2o1's Avatar
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    Why would Toto put legs on the tub if not to support it? It will also be supported by the rim.

    John

  5. #5
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    Default Toto says

    The installation instructions from Toto say do NOT support the tub by the rim. If we use a mud bed, how will that help level the tub? The tub weighs over 300 lbs - wouldn't it just sink to the bottom of the mud bed?

    Thanks!

  6. #6
    Plumber Cass's Avatar
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    Yes it would just sink...shim with composite shims...

    What does the instructions say about leveling...probably to place it on a level floor....

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