I would like to add a second sink in a bath. The second sink will be between a sink and a 3 inch vertical waste/vent. The waste going from the sink to the 3.0 waste/vent is 2 inch. What kind of "T" would I have to use.
Thanks
Chuck
You need venting provisions, but without more information cannot tell how you have to do it. In most cases it needs more revisions than just making a small hole in the wall.