Replacing frequently used pieces of plumbing in a bathroom is easily than it may seem. For example, the sink plug can often stop sealing sufficiently to hold water in the sink or break and hold water when draining is desired. You can solve the problem easily by replacing the failing sink plug, and the procedure can be completed in just a few minutes, returning your bathroom sink to its proper operation.
Disconnect the vertical sink drain control rod from the sink plug pivot arm by removing the small metal connector clamp that attaches the two beneath the sink. This small clamp can be V-shaped, in which case you can release it by squeezing the open end together to free the control rod, or cylindrical, in which case you should loosen the screw in its side with a screwdriver.