Re: Relocated bathtub - height required for drain?
Posted by e-plumber on December 24, 2003 at 15:20:41:
In response to Re: Relocated bathtub - height required for drain?
: : : I am planning a renovation in a concrete apartment building which, unfortunately, requires the bathtub to be moved such that the tub drain is approximately 6.0 feet from the existing drain location. Given that it is not possible to go into the floor with new plumbing, I suppose I will have to raise the tub for the P trap and required drain line slope to the existing drain/vent location.

: : : My questions: By what height would I have to raise the tub for this to work? Also, is there anything else I should know - am I missing anything that would make this a bad idea?

: : : Thanks for any help, and happy holidays!

: : Reply:
: : You may want to consider cutting a channel in the cement for the bathtub drain. The bathtub is not going to look so good raised off of the floor.
: : You need 1/4" per foot pitch to the location of the existing drain.
: : Good Luck & Happy Holidays. e-plumber

: Thanks for the info, e-plumber. However, in addition to the 1/4" per foot pitch, what about the P trap under the tub drain? Would the height required for the tub not primarily be set by the depth required to the bottom of the P trap? And what might that distance be (from the bottom of the tub to the bottom of the P trap)?

: Thanks again for your help.

You would need to go the website of the bathtub manufacturer and look up the specs. for your particular bathtub, all this info is available online.
Also you may need the model number of the bathtub waste overflow you're using, then do your calculations and decide which route to take.

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