Fix Your Leaking Bathroom Sink In Just 4 Easy And Quick Steps! 

Fixing Your Bathroom Sink Step 1: A Leak At The Drain Body

First, you need to take your slip-joint pliers or adjustable wrench and tighten the retaining nut.  Then, once you have completed the step above, you need to inspect the sink.  Once removed, you will need to replace the gasket or washer, which you can find under the area where the retaining nut was situated.

Fixing Your Bathroom Sink Step 1: A Leak At The Drain Body

If you still notice leaks once everything has been put back, then you need to check the lift mechanism. If you notice it is damaged or worn, then it is best to replace it. Alternatively, you can try to replace the pop-up assembly or drain the body to see if this fixes the issue.

Fixing Your Bathroom Sink Step 2: A Leaking At The Trap

First, you will need to make sure all of the locknuts and slip nuts are tightened at a quarter-turn. Here, you should not be aggressive, but it is important to be firm. Then, you need to take a dry rag and clean the trap assembly as a whole.

Fixing Your Bathroom Sink Step 2: A Leaking At The Trap

If you notice leaks forming at the slip nuts, it is time to remove parts of the trap, such as the bend and arm, and once you do so, change the washers.  If you notice that the arm or bend of the trap has been corroded or otherwise damaged, then you will need to replace this, too.

Fixing Your Bathroom Sink Step 4: Leaking At The Sink Flange

First, you need to remove the trap bend.  Now, you need to take away the drain body.  Once you have completed the step above, you can go ahead and apply a strip of plumber’s putty to the flange lip. It is best to follow the manufacturer’s instructions when you do this.

Fixing Your Bathroom Sink Step 4: Leaking At The Sink Flange

Now, all you need to do is wipe away the excess putty that may be sitting around the flange with an old rag.  If you notice that the leaking has not stopped, then you need to, using quarter-turns only, tighten all of the connections on the sink to ensure that the leaking stops.

Fix Your Leaking Bathroom Sink In Just 4 Easy And Quick Steps!