Step 8 · Check for Leaks
With all plumbing connections made, it's time to test for leaks before finishing the installation. Place a dry paper towel under the hot water shutoff valve and where the supply line connects to the dishwasher. Slowly turn the water shutoff valve all the way on. Use a flashlight to carefully inspect both connection points for any signs of dripping. If any moisture appears, turn the water off and tighten the leaking connection slightly. Once you confirm the supply side is dry, turn the power back on at the circuit breaker. Start a 'rinse only' or 'quick wash' cycle. As the dishwasher fills and then drains, check the supply and drain line connections again for any leaks.