Test Drain Functionality and Check for Leaks

What happens here

With the drain system reassembled, it's time to test for functionality and leaks. First, test the pop-up stopper mechanism by moving the pop-up bar up and down to confirm it effectively opens and closes the drain. Then, turn on both the hot and cold water faucets to a full stream. Observe the water draining. It should flow quickly and smoothly, much faster than before the cleaning. Simultaneously, look underneath the sink for any signs of water drips or leaks around the P-trap connections. Pay close attention to all joints.

Goal: Verify proper drain operation and ensure no leaks