Installed a vessel sink and granite counter top. The total distance from from the top where the drain goes to the bottom of granite counter is 2 7/8 inches. I have purchased 2 drains and they are short. Been to plumbing supply stores and they say they don't make threaded extensions. I need help. I need an either an extension that I am able to thread and tighten or a drain that is at least 3" so I can tighten so the sink will not leak. Any help is appreciated.
They do make a few drain styles that should work seeing that this type of sink is popular. the drain may have a push down pop up style and they also have a style that you lift up and push down. these tend to have a longer thread pattern. check online stores and other outlets other than your supply house. you may have to spend a lot on this but it may help. try this link check the specs tab. good luck