How To Replace A Dishwasher Drain Hose

3 February 2016
 Categories: , Blog


If your dishwasher is slow to drain, check the drain hose. The drain hose connects to the sink's drain pipe sending a mixture of water and soap into the tub to clean dishes. Dishwasher drain hoses easily get damaged after much use. Here are some tips to replace a dishwasher drain hose.

Prepare to Work

For this project, you need:

  • work gloves
  • screwdriver
  • sticky note
  • pencil or marker
  • old rag
  • towels or bucket
  • voltage tester
  • electrical tape
  • pliers or adjustable wrench
  • replacement drain hose 

Unplug the dishwasher from the outlet usually located under the sink or turn off power at the breaker. Test the unit with the voltage meter to ensure there is no current.

Place a sticky note on the breaker box and electrical tape on the breaker you switched off so no one will turn it on while you work. Look for a water shutoff valve under the sink, and rotate the valve to the right. 

Remove the Old Drain Hose

The drain hose should be close to the dishwasher drain connected to a pump on the bottom sprayer arm, or air gap, a device that prevents back flow. Lay an old towel, bucket, or rag under the pipe to catch drips. Store hardware in a small container. Remove the bottom front panel screws with the screwdriver.

If the panel is attached by a clip, insert pliers between the dishwasher and panel, then pull it out. Pinch the clamp screw with pliers, and remove the drain hose from the pump. Disconnect the plastic nut on the water inlet assembly inside the tub with pliers to free the hose at the other end.

Connect the New Drain Hose

Move the dishwasher out from below the cabinet slightly you can access the back. If you have trouble moving it, look for the junction box behind the front service panel. Loosen the screws to remove the cover, and disconnect the wires taking note of how they connect or take a picture of the connections with your cell phone.

Connect the new hose to the pump routing it the same way as the old hose, and tighten the clamp. Route the other end through the back under the dishwasher, being careful not to get it tangled on other connections.

Connect the other end of the hose to the water inlet, and secure the nut with the pliers. Restore power to the dishwasher, turn on the water, and test the hose with a small rinse cycle without dishes. Reinstall the access panel referring to your photo for wire connections, if you don't see any leaks.

Your dishwasher should be back in operation after this simple repair. For more information, contact A-1 Appliance Service or a similar company.