Re: 3" or 4" drains for toilets
Posted by hj on July 24, 2003 at 09:22:59:
In response to Re: 3" or 4" drains for toilets
It is a code issue. Most codes allow 3" for up to 3 toiiets as long as one toilet is at least 15 feet from the others. There is no benefit to 4" for an installation like this. Once you install the fouth toilet or place the third toilet close to the others, then you have to transition to 4" at that point.

: I'm building a new house and want to know if it makes much difference what size drain you use for the toilets.

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