I have a glass vessel sink that I want to install above counter, with a mounting ring between the glass bowl and the counter. The problem I have is that the threaded part on the pop-up drain that came with the sink is not long enough. (Below is a picture of the drain. Note that the mounting ring is not shown on the picture.) The counter is 1.75 inch thick. The threaded part does not stick out underneath the counter, so I cannot tighten the nut to secure the sink.
I have been to numerous plumbing stores to look for a drain that has longer thread, but could not find one. Does anyone know of a drain that works with a thick counter top?
The guy in one store confused me even more. He said that the nut should be tightened against the mounting ring, not against the underside of the counter. In that case, the thread is long enough, but how would I secure the sink to the vanity so it is stable?
Thanks for any help and pointers.