View Full Version : two toilet rough in
almissy5
08-18-2008, 08:51 PM
I am building an addition and have two toilets that are about 3ft. apart and are in line with each other and in lint with the 4in. stack. The 4in stack is about 8 ft. from the farthest toilet. Can I drain both of these toilets on the same 3in. horizontal line using wye's or do I need to run a line to each toilet?
Terry
08-18-2008, 09:59 PM
Each toilet needs to be vented separately. After they have been vented, then they can join.
Connecting two, or more toilets, to the same line is not the problem. HOW you do it is where the problem can come in. As long as each toilet is properly vented, and the pipe is the proper size, it makes no difference how many toilets are on it.
nhmaster
08-19-2008, 05:46 AM
the old code said that you could only put 2 toilets on a 3" horizontal branch. THe IPC lets you do lot's more but I like the old rule better.
nhmaster
08-19-2008, 05:47 AM
Oh also the IPC will let you have "unlimited" distance to vent with a water closet.
The old code said you could have 3 toilets on a 3" horizontal line, but the third one had to be at least 15' from the other two.
nhmaster
08-19-2008, 02:31 PM
Not BOCA, only 2 on a horizontal if I remember correctly but it has been 20 years so I could be wrong. I'll see if I still have an old BOCA book hanging around.
almissy5
08-20-2008, 09:47 AM
Thanks for all of the advice. I also want to attach other fixtures to this drain. In order from furthest from main stack to closest is: 1-Bathtub, 1-toilet, 2-sinks, 1-toilet, 1-shower. Should I just run a 4in horizontal and tee off to these additional fixtures? or can these all be handled with a single 3 in horizontal.
Thanks
Al
BOCA? That was not a a code. It was the building contractor's idea of how to install plumbing at the least possible cost. At one time they were toying with the idea of 3/4" vents because they would be cheaper and easier to install, and they felt that the traps only needed a little bit of air anyway.
nhmaster
08-20-2008, 02:35 PM
BOCA? That was not a a code. It was the building contractor's idea of how to install plumbing at the least possible cost. At one time they were toying with the idea of 3/4" vents because they would be cheaper and easier to install, and they felt that the traps only needed a little bit of air anyway.
Hey, what can I say? No one asked my opinion when they decided to adopt it. ::mad: