uneven drain hole in new bathroom sink with pop up stopper - how to stop leak?
installing new vanity with porcelain sink and pop up stopper. all of this was preassembled. once plumbing connected there were 2 leaks. 1. around drain in sink - disassembled and found sink hole uneven. 2. pipe at bottom of pop up has small crack around threads. How can uneven drain hole be made up for?