What is the recommended size of box I should use to "Frame In" the bathtub drain for a basement rough install? I was thinking of using a treated 1" x 10" to make a 14" x 14" box. Will the 9 3/4" be too deep? I was also told to place a little concrete in the bottom of the box to prevent any water from seeping up through the box. Is this necessary?

Thanks in advance for any help.

Dan

speedball1

Hi Dan,
14 X 14"is fine, as is 9 3/4" deep. you can always fill in or dig some out if necessary. Cementing the floor of the tub dap out isn't necessary. We have never had a complaint about seepage but then we don't rough too many houses in a swamp where the water table's higher then the rough in. Besides you might wish to position the trap during installation or perhaps change out the tub later. good luck, Tom

Raptor_x

Thanks for the quick reply. The resource here is much appreciated.