If you are using a built-in dishwasher the dishwasher inlet is connected to the garbage disposal at the top of the hopper. The garbage disposal comes new with the dishwasher inlet pipe closed off, so before use, the knockout must be removed as per manufacturer instructions.
Once connected, the dishwasher outlet hose is connected to the garbage disposal's dishwasher inlet pipe and drains through the disposal.
Make sure to run the disposal BEFORE you run the dishwasher to ensure water drainage.
