Hello,

I am planning to build my basement with full bath (sink, toilet, stand up shower). Unfortunately the house doesn't come with a rough in. Does anyone know where I can find some steps and procedures on how to put a rough in?

All rough ins are a little bit different. You have to be there, or have a set of plans, to lay it out. Do you have a set of plans showing the sewer main and where you wish the different the fixtures to be placed? For a rough explanation most bathroom groups are roughed in like this.
Toilet connects to sewer main or the stack vent. Lavatory connects to toilet drain and runs a vent off the top the stubbed tee out the roof or refinds back into a dry vent in the attic.. The toilet wet vents through the lavatory vent and the tub/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 and also The Standard Plumbing Code Book in 90 percent of the country. Check your local codes.to make sure you're not in the excluded 10 percent.. The vent off the lavatory may be run out the roof or refunded back into a dry vent in the attic or if you're refinding back into a fixtures dry vent you must make your connection at least 6 inches over that fixtures flood rim.
Good luck and if you send us the plans we'll lay it out for you. Regards, Tom

Mgm, I have a very basic question, where does you sewer drain exit the home? Through the wall or through the floor?

SpeedBall - how do I upload my plan?

Ballengerb - I can see the main sewer line on the wall going under the cement connecting to the basement floor drain.

SpeedBall - how do i upload my plan?

Ballengerb - I can see the main sewer line on the wall going under the cement connecting to the basement floor drain.
You use the attachment feature to post your plan.
Bal wasn't asking about the stack, he was asking where the house main left the house. That's where the house clean out should be. Regards. Tom

Mgm, from what you describe your main drain is under the floor which is good, now we won't have to incorporate an ejector pit/pump.

Attached is my plan. The main drain is beside the bathroom toilet. I spend a day with a jack hammer breaking the concrete. I found that out that they are using ABS pipe for all the house piping except the main drain under concrete which they are using PVC.
4' PVC pipe. So I decided to cut the main drain pipe and hook up with a y ABS pipe but I found out it's a different size. So I bought a PVC/ABS coupling and attached on both end of the Y ABS pipe. It took awhile to hook the Y ABS to PVC main pipe. Basically I put the coupling on both end of the PVC main pipe with out seal, then attached the PVC Y and tried to push the coupling as closed as possible to the PVC Y (not very much), then finally I applied the seal outside the pipe (around the connector). Hopefully this hold.

This is my next steps.
1. I am planning to run the underground pipe with 3' but have a reducer for shower 2' and sink 1 1/2'. Toilet with 3'.

Now I heard Venting is very important with plumbing. I assumed the main pipe that I connected to should already have a Vent pipe that go straigth to the roof. So I don't need to run any vent pipe again. Is this right?

Now I heard Venting is very important with plumbing. I assumed the main pipe that I connected to should already have a Vent pipe that go straigth to the roof. So I don't need to run any vent pipe again. Is this right?
No! You may not use the stack vent as a vent stack for your basement bath room group. I have given you a typical basement rough in, (ie) most bathroom groups are roughed in like this.
Toilet connects to sewer main or the stack vent. Lavatory connects to toilet drain and runs a vent off the top the stubbed tee out the roof or refinds back into a dry vent in the attic.. The toilet wet vents through the lavatory vent and the tub/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 and also The Standard Plumbing Code Book in 90 percent of the country. Check your local codes.to make sure you're not in the excluded 10 percent.. The vent off the lavatory may be run out the roof or refunded back into a dry vent in the attic or if you're refinding back into a fixtures dry vent you must make your connection at least 6 inches over that fixtures flood rim.

You must run a vent off the lavatory to vent your group. Good luck, Tom

Quote "The vent off the lavatory may be run out the roof or refunded back into a dry vent in the attic or if you're refinding back into a fixtures dry vent you must make your connection at least 6 inches over that fixtures flood rim."

Are you referring to Revent or auxiliary vent? I am not sure if there is one the run down to my basement. I think the main vent stack are connected on the main floor and upper level.

Let's come together on terms. Vent stack= A dry vent that terminates through the roof.
Stack vent= a vent stack that has fixtures draining into it.
You may not connect any fixture to a stack vent. (and this is what the vertical pipe in yoiur basement is) without running a vent either through the roof or back (revent) into a dry vent stack. In other words a vent MUST be run off the lavatory up to where you can tie back to a dry vent. This is not a "auxiliary vent" it will vent the entire bathroom group if you install it the way I described earlier. Regards, Tom

Ok. I think I got the terms now. I had a plumber checked my installation and he said that I don't really need to run another vent on my lavatory since my bathroom sink, toilet and shower are already connected to the main drain pipe and the main drain pipe is connected to the vent stack. Also the bathroom sink and the shower has a P trap that prevent the gas coming back. What do you think?

Ok. I think I got the terms now. I had a plumber checked my installation and he said that i don't really need to run another vent on my lavatory since my bathroom sink, toilet and shower are already connected to the main drain pipe and the main drain pipe is connected to the vent stack. Also the bathroom sink and the shower has a P trap that prevent the gas coming back. What do you think?
Your plumber is DEAD WRONG! What you are proposing to do is to discharge major fixtures,( the bathroom that empties into the stack vent) past unvented fixtures downstream from the upper bathroom group. In this case your basement bathroom. I kinow of no US or local plumbing code that will allow this. You simply can not do it. Period! Call your local building department and check. And get a plumberv in there that knows code. Good luck, Tom