I am in the process of remodeling an old 1/2 bathroom. Included in the scope of work is installing a new sink where there previously, was none. There is a kitchen in the next room - they share a wet wall in which is a drain pipe, and water supply for the kitchen. This, as you know, saves me a TON and a half of work. Question: "How do I tie into the old drain pipe for the new sink? The old pipe looks like some kind of black metal...the new drain will be PVC, of course. Must I still cut the old drain pipe and place a "t" smack in the middle of it?
Thank you in advance for your help.
G P Richards

The paragraph below is the original question I asked a couple of weeks ago. This time I added a sketch of the pipes as they are. I am wondering if it would be best to remove the "T" that is there now, (which leads to the kitchen sink), and replace it with a "wye" which would replace the kitchen sink drain connection, AND to the new bathroom drain for the bathroom sink. The bathroom sink will be situated directly in front of the main drain pipe. Is there a fitting that would allow me to go in two different directions from where the "T" fitting is now?

I am in the process of remodeling an old 1/2 bathroom. Included in the scope of work is installing a new sink where there previously, was none. There is a kitchen in the next room - they share a wet wall in which is a drain pipe, and water supply for the kitchen. This, as you know, saves me a TON and a half of work. Question: "How do I tie into the old drain pipe for the new sink? The old pipe looks like some kind of black metal...the new drain will be PVC, of course. Must I still cut the old drain pipe and place a "t" smack in the middle of it?
Thank you in advance for your help.
G P Richards

Hi G.peterrichards

What is dumping into the main drain from above all this? If anything at all then the new bathroom sink will need to have its own vent added in... ;) Does the kitchen sink have its own vent?

Also, you said something about removing the tee that is there now and installing a wye, but you show a wye for the sink connection in your drawing... is the drawing the existing work or the work you want to do?

Finally, what are the pipes you show above the sink connection... vents? Let me know, OK?

Mark

The sketch is how the pipes are now... My drawing skills may not be all that... The main drain pipe from the 3rd floor bathroom... that's all I know. It's an old house. But, What I am getting at is this; is there a fitting that will allow me to take out the fitting that leads to the kitchen sink and replace it with one that goes into both the kitchen and one that goes in the other direction?

YUP! You can install a double TY or a double wye fitting... depends on what fitting is there now.

The bath sink and the kitchen sink should be vented, too... ;)

Mark