Step 6 · Restore Power and Test for Leaks
With all connections made and tightened, it's time to test your work. Place the decorative cover over the top of the air gap body on the countertop. Go back to the electrical panel and turn the circuit breakers for the dishwasher and garbage disposal back on. Run the kitchen faucet and turn on the garbage disposal briefly to ensure it is clear. Start your dishwasher on a 'Rinse Only' or 'Drain' cycle. As the dishwasher pumps water out, use a flashlight to carefully inspect all your connections: where the dishwasher hose meets the air gap, where the air gap hose meets the disposal, and around the base of the air gap on the countertop. Watch closely for any drips or leaks. If a leak is found, immediately turn off the dishwasher, shut off the power again, and re-tighten the leaking connection.