Plumbers must remove what component when connecting the dishwasher drain to a garbage disposal?

Plumbers must remove what component when connecting the dishwasher drain to a garbage disposal?

• A. Knock out plug
• B. Air gap
• C. Gasket
• D. Trap adapter

Answer: (A)

When tying a dishwasher drain into a garbage disposal, you open the disposal’s inlet by removing its knockout plug. That plug is there to seal the inlet during manufacture, so wastewater has no path into the disposal until you’re ready to connect. Removing the knockout creates a clear channel for the dishwasher drain hose to enter the disposal, allowing proper drainage. If the plug stayed in place, the dishwasher wouldn’t be able to drain into the disposal at all, leading to leaks or backup. After knocking out the plug, attach the dishwasher drain hose securely. The other parts listed—gasket, trap adapter, and air gap—serve different functions and aren’t removed to make this connection.

When tying a dishwasher drain into a garbage disposal, you open the disposal’s inlet by removing its knockout plug. That plug is there to seal the inlet during manufacture, so wastewater has no path into the disposal until you’re ready to connect. Removing the knockout creates a clear channel for the dishwasher drain hose to enter the disposal, allowing proper drainage. If the plug stayed in place, the dishwasher wouldn’t be able to drain into the disposal at all, leading to leaks or backup. After knocking out the plug, attach the dishwasher drain hose securely. The other parts listed—gasket, trap adapter, and air gap—serve different functions and aren’t removed to make this connection.