Install a sink basket strainer. Notice that all the dishwasher drains in the garbage disposal have a plug on the inside. Pin On Plumbing But the truth is these two items work together to help break down food and keep your dishes clean. How to install a dishwasher without a garbage disposal . Attach the backup ring the fiber or rubber gasket and the mounting ring to the flange from beneath the sink. Put inside a threaded stem through the top of the air gap fitting into the hole that exists at the back of the sink. Connect Hose to Air Gap First connect the dishwasher drain hose onto the small side of the air gap mounted on the countertop or sink deck. Take a floor mat or a blanket and place it on the floor to comfortably install it without getting yourself hurt. Disconnect the garbage disposal from the sink. Turn off the households water supply at the main valve. Install the drain pipes. Tighten the clamp to fasten the pipe cap into the connector. Plumbing and heati...