Ask Me Help Desk - Schematic Rough in

I am doing my best to get a bathroom up and running in the next two months before my parents come for an extend visit. What I need is some advice on where to find schematic layouts of how best to rough in the bathroom.. I can set the fixtures and get the supply lines in. Where I fall short is in the layout of the four components; commode, shower sinks and the vents. The shower will be 3' 6" next to the cast iron waste stack (and vent stack) for the house. The commode will be located ajacent to the shower being 6 feet from the stack. Can I run the shower drain into the waste line from the commode? I assume that I do this after the commode has turned towards the stack. Can I also run the sink waste line into this same line? I will vent the sinks at their source. How is the shower and the commode vented? Are these wet vented through the main stack or is there another way this is done.

Thanks for any and all help on this problem. Mom and dad and coming and they need a place to shower.

Thanks

Most bathroom groups are roughed in like this.
Toilet connects to sewer main. The toilet wet vents through the lavatory vent. Lavatory connects to toilet drain and runs a vent out the roof or revents back into a dry vent in the attic off the top the stubout tee. The shower connects to the lavatory drain and is wet vented by it. This is a normal rough in and is acceptable both by local and state codes but also The Standard Plumbing Code Book.

Thanks a lot. Just a little more clarification for a rookie. The Toilet wet vents though the lavatory vent, where is the lavitory vent? Is that the stack itself. In this case the entry point for the waste line is prety much at the top of the waste stack. The only house vent comes out of the top of this stack. When you saythat the lavatory(sinks for me) connects to toilet drain and runs a vent out the roof or revents back into a dry vent in the attic off the top the stubout tee. What is the stubout tee? Is that the waste stack as I call it or the main drin stack. I was going to dry vent each sink bringing a 1 1/2 " pipe over the top of each sink and then tie that into the stack above all the other fittings into the stack.

I hope I'm making sense.

Your info was VERY helpful to me. Keep it coming.

Before we go much farther we have to get on the same page with terms.
Sink= kitchen sink. Lavatory= bathroom sink.
The vent will come off top of the sanitary tee used to stub out for the lavatory and will run a vent out the roof or revent back into a dry vent in the attic. If you have two lavatories,( and you only mention it by adding a "s" onto sink.) they will connect by a continuous waste, drain into the same tee and be vented by the same vent.
More terms, Stack vent= a vent that has fixtures draining into it. Vent stack= a stack vent that's above all the fixtures that drain inti it and runs out the roof.
You may revent into the vent stack at any point over 6" above the flood rim of the highest fixture draining into it.
Sorry for the technical terms but I'm a plumber and that's how we make ourselves understood. Regards, Tom

So my toilet will go directly into the waste stack. The shower can drin into that same line and can does not require a dry vent. The lav sinks will tie into the same waste line as the toilet by 6" 8"? Downhill from it's last trun twards the waste stack using a y. If I tie the shower drain into the lav drian 8" before the Y to the toilet will that vent the shower?
I hope this makes some sence. New language for me. I understad that all Y's must go in the direction of the flow. Do I use 1 1/2" pipe (PVC) for the lav and shower and 3" for the toilet.

Quote:

Originally Posted by bglover

So my toilet will go directly into the waste stack. The shower can drin into that same line and can does not require a dry vent. The lav sinks will tie into the same waste line as the toilet by 6" 8"? downhill from it's last trun twards the waste stack using a y. If I tie the shower drain into the lav drian 8" before the Y to the toilet will that vent the shower?
I hope this makes some sence. New language for me. I understad that all Y's must go in the direction of the flow. Do I use 1 1/2" pipe (PVC) for the lav and shower and 3" for the toilet.

Your toilet will connect to the stack vent. The lavatory drain will connect to the toilet and a vent through the roof will come off the lavatory and the shower will connect into the lavatory drain and be wet vented by it.
Regards, tom