Original Question #1 Report Inappropriate Post Yesterday, 04:50 PM
coseme
New Member Join Date: May 2008
Posts: 1

I am building a bathroom with toilet on the upper floor of my home. I need to know how to run the piping so as to connect into the existing sewer pipe in the basement.I have never piped in a toilet so need to know exactly how to connect the toilet to the waste pipe, pipe size, gradient required, how to vent this pipe, how to connect a shower and basin drain into this pipe and lastly and most importantly how to connect into the existing sewer line in the basement.This is partially embedded in the concrete floor but there is a cleaning elbow on the surface. Is it possible to remove the cleaning plug and pipe into this but also provide a new cleaning elbow in this new line.The other possibility is to connect into the existing cast iron sewer pipe that is exposed before it disappears into the concrete slab.Your help would be very much appreciated.

Most bathroom groups are roughed in like this. (see image)
Toilet connects to the stack vent. Lavatory connects to toilet drain and runs a vent off the top the stubout tee out the roof or revents 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 revented back into a dry vent in the attic or if you're reventing back into a fixtures dry vent you must make your connection at least 6 inches over that fixtures flood rim. Your slope will be 1/4" to the foot. More questions? I'm as close as a click, tom

Thank you Tom for the help that you have given me.It will help. However you still didn't tell me how to connect into the existing sewer/waste line in the basement.This is the most important part of my question

Thank you Tom for the help that you have given me.It will help. However you still didn't tell me how to connect into the existing sewer/waste line in the basement.This is the most important part of my question
And thank you for the negative (red) comment.

I need to know how to run the piping so as to connect into the existing sewer pipe in the basement.
Let's go back and read my post. Perhaps I missed something. Toilet connects to the stack vent. Nope! Nothing missing here. I told you right where to tie the upstairs bathroom group into. Did you want me to direct you to install a 3" stack down to the basement where you could jackhammer up the cement, cut in a wye or combination into the main and connect like that? Now, if you don't have any vertical stacks that you can tie back to that just be your only recourse. In that case you're not going to get your remodel passed by connecting a entire bathroom group into a cleanout tee. Time to rent a jackhammer. Have at it, Tom