Step 9 · Final Checks and Cleanup

This is the step people usually slow down on. Go finger-tight first, then a quarter turn. No rush — replay the clip whenever it helps.

The final step is to check your work. Remove all tools and materials from the cabinet. Slowly turn the hot and cold water shutoff valves back on (counter-clockwise). Immediately inspect all connections for drips: where the supply lines meet the valves and where they connect to the faucet. If you see any drips, tighten the connection slightly. Next, place a bucket under the P-trap and fill both sink basins with water. Let them sit for a few minutes, checking the silicone seal around the sink rim for any leaks. Then, release the water and check the entire drain assembly and P-trap for leaks. Finally, turn on the power to the garbage disposal. Run water and turn on the disposal to ensure it operates correctly and there are no leaks from the vibration. Once everything is confirmed to be dry and working, clean up your tools and the work area.