Just doing some initial research now. Our upstairs bathroom currently has a single sink and I would like to know the extent of the work necessary to replace the existing vanity with a larger one that will accomodate two sinks. Can supply and drain lines be run connected to the existing lines that are there for the single sink (essentially creating a "Y" with each of the existing lines, with each drain having its own trap) or will this job require separate plumbing runs further into the system?
Going from Single to Double Sink in Bathroom Vanity
Feb 15, 2004
1 Replies
I would use a double WYE 1 1/2". That will give you a branch in each direction plus a CO plug in the center. Use a 1 1/4" trap adapter at each branch inlet for the traps.
It's also possible to use a single 1 1/2" trap with a "center outlet" TEE assembly (commonly used on double bowl kitchen sinks). A special reducing washer will accomodate the 1 1/4" sink tailpiece into the 1 1/2" TEE assembly. If the bowls are too far apart, use the 2 traps instead of this method.
Jim
Join the Discussion
Have something to add? Share your thoughts — no account required.
Didn't find your answer?
Ask the community — no account required