Re: Convert bath/shower drain to shower drain
Posted by ED on July 12, 2004 at 16:58:19:
In response to Re: Convert bath/shower drain to shower drain
Two inch pipe is the MINIMUM size for drains under a concrete slab.

There is a REAL possibility with clogs on an 1 1/2 inch drain.

It's also a lot easier to snake out a two inch p-trapped pipe under the slab than an inch and a half.

Don't forget you need to vent the shower drain as well.

: : i have a ruff in bath/shower drain of 1 1/2" in my basement but want to chnage this to a shower only. would the 1 1/2" work or do I need to bust up the concrete and replace with 2". I'm at the stage of finishing the concrete shower pan and really do not want to bust up the concrete. I'm about 4 feet from the main drain.

: : What can I do?

: Reply:
: The correct way to do it would be to open the cement floor as needed to run a new 2" drain for the shower. If you connected the 2" shower drain to the existing 1-1/2" drain pipe, it would probably work but it is not a legal plumbing connection and could possibly lead to standing water while showering or repeated clogging.
: An inspector would fail the job if it were filed and inspected.
: e-plumber

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