How to Remove the Air Gap on a Dishwasher

Turn off the electricity for the dishwasher. In most cases, this means you will have to shut off the power for the circuit where the dishwasher is located.

Turn off the water supply for the dishwasher. In most installations, the dishwasher will be attached to the hot water supply valve located beneath the kitchen sink. Rotate this knob clockwise to turn off the water.

Open the dishwasher door to gain access to the mounting screws holding it in place. Unscrew these and set them aside.

Pull the dishwasher out of the space where it is located to gain access to the drain hose.

Use the screwdriver to loosen the hose clamps on the air gap. There will be one for the intake side and one for the outlet.

Remove the air gap cap located on the countertop. Usually, this will be next to the sink. Use a pair of pliers to unscrew the retaining nut that holds the air gap tower in place. Pull the air gap tower from underneath the counter.