View Full Version : toilet / shower / vent configuration

11-23-2008, 12:37 PM
I'm trying to configure a toilet, a bathtub/shower combo, and a dry vent in a 6 x 10 1st floor bathroom. My county uses 1999 BOCA code. Can the 2" dry vent be positioned as shown, upstream of the toilet? What other tips can you provide? For example, use a wye as a cleanout instead of a co tee, don't put a 45 roll on a combination wye+1/8 bend, etc.?
Thank you.
(drawn w/ free Google SketchUp)

11-23-2008, 12:45 PM
Lets see now the toilet is not properly vented, the shower is not vented and has a running trap...

What's the deal with the other pipe by the lav sink?

11-23-2008, 12:56 PM
So the toilet vent must be on the toilet branch itself, or at least downstream of where the toilet branch drains into the 4" main? What is a running trap? The shower trap is about 16" from the shower drain. The drop from the drain to the trap is about 8". The vent is less than 5' from the shower trap. What am I missing?

11-23-2008, 12:58 PM
The other pipe by the lav sink is the soil stack from the 2nd floor bath.

11-23-2008, 01:01 PM
Okay and the fitting that it and the lav sink drain enter the 4" main is a ???

How does the vent connect above?

11-23-2008, 01:32 PM
The fitting that it and the lav sink drain enter the 4" main is a 3" combination wye+1/8 rolled 45 toward the wall. A wye plus a 45 elbow would fit in the available space, too.

The 1st floor lav's vent proceeds to 6" above the 2nd floor lav's rim.

11-23-2008, 01:34 PM
The 1st floor lav's vent proceeds to 6" above the 2nd floor lav's rim, where it joins the main stack vent.

11-23-2008, 03:09 PM
In that case it would be the only part of your drawing that is correct.

Obama the Plumber
11-23-2008, 04:50 PM
The tub isn't vented or the toilet.

With a toilet, you would go, toilet, then a vent, the vent being higher than the pipe for the toilet. Not the toilet being higher than the vent. Because air should be over that water. That is why vent pipes are on top of water pipes.
And that is why you have an ocean, and then you have sky.
If you turned it the other way, the fish would be flying and the birds would be swimming.
If you pour water into an empty bucket, the water winds up on the bottom, and the air winds up being above the water, you can't make the air stay under the water, it bubbles back up and becomes the sky.
And the fish like swimming in water.
There is one bird that swims and flies, what bird is that you ask?
Yeah, that's a good question too.

11-23-2008, 04:55 PM
Sounds like a cormorant to me...

11-24-2008, 12:24 AM
May I suggest contracting a plumber to at least draw out some proper plans. At least he would know the code and how to lay out your drain, waste and vents. Also another option is to go get a permit for the job you plan to tackle and talk to the plumbing inspector 90% of the time they will be more than happy to help you do it right. The other 10% will tell you to hire a plumber.