Toilets, Sinks, Showers, Tubs and Disposals - Cast iron bathtub install

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jstewart
06-24-05, 02:44 AM
I am installing a standard 5' Kohler cast iron tub. I have a solid, level floor. I know steel and fiberglass tubs need a 2 x 4 (or other) support attached to the wall studs to support the tub flange. Is this support necessary for a cast iron tub? It seems like I can do without it since the tub has little feet under it, but I want to double check. Please reply soon--I need to get on with this job!

Thanks.

DUNBAR PLUMBER
06-25-05, 11:36 PM
Yes. Install stringers for support. The floor if it becomes damaged by water will not support the tub in the case of water damage.


I would still use a bed of mortar underneath tub for support; make sure to put poly between tub and mortar.