How to Replace a Dishwasher Drain Hose

 

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This dishwasher repair guide shows how to replace the drain hose that connects the drain pump to the drain line that carries water to the sink drain. If the drain hose leaks, remove it and replace it with a manufacturer-approved replacement part.

Repair difficulty:
     
Time required:

Less than 30 min.

Parts Required

  • Drain hose

For manuals, repair guides, and specific part recommendations, enter your model number.

Tools Required

  • 1/4" nut driver
  • Slot screwdriver
  • Channel lock pliers
  • Standard pliers
  • Towel
  • Work gloves

Before you begin

Wear work gloves to protect your hands.

Instructions

 Warning: Undertaking repairs to appliances can be hazardous. Use the proper tools and safety equipment noted in the guide and follow all instructions. Do not proceed until you are confident that you understand all of the steps and are capable of completing the repair. Some repairs should only be performed by a qualified technician.

Step 1: Shut off electrical power and water supply to the dishwasher

Flip the house circuit breaker switch to the Off position to completely disconnect electrical power to the dishwasher (some older homes instead have a fuse that you remove from the fuse box). To verify that power is disconnected, make sure the display on the control panel can't be activated.  

Find the water supply valve for the dishwasher under the sink (or in the basement). Close the valve to shut off the water supply going to the dishwasher.

Step 2: Remove the bottom front access panel and toe panel

Using a 1/4" nut driver, remove the screws that hold the front access panel in place. Pull the access panel and the toe panel forward, remove them and set them aside. 

 Tip: Refer to your installation manual for more details on removing the bottom front access panel and the toe panel, if necessary.

Step 3: Pull out the dishwasher

The junction box is at the front of the dishwasher just behind the bottom front access panel. Remove the cover on the junction box and disconnect the wires.

Remove the 2 mounting screws from the brackets that secure the dishwasher in the cabinet opening.

Pull the dishwasher out from under the counter. You should have enough slack in the water supply line and the drain hose to pull the dishwasher in front of the counter opening for the dishwasher. 

 Tip: You might have enough slack in the electrical supply wiring so that you can pull out the dishwasher without disconnecting the wires.

Step 4: Disconnect the drain hose from the drain pump

Reach under the dishwasher and squeeze the wire hose clamp that holds the drain hose to the drain pump—use pliers if necessary. 

Pull the end of the drain hose off of the drain pump.

 Tip: Place a towel under the drain pump to absorb water from the drain hose.

Step 5: Remove the drain hose from the water inlet assembly

From the inside of the dishwasher tub, use a pair of channel lock pliers to remove the plastic nut that secures the water inlet assembly. 

The water inlet assembly secures the drain hose to the outside left panel of the dishwasher tub. Pull out the water inlet assembly  to release the drain hose from the bracket.

Step 6: Disconnect the drain hose from the drain line to the sink

Separate the drain hose that goes to the kitchen sink drain from the dishwasher drain hose that extends to the drain pump.

The drain hose is connected to the outlet on the drain pump with a wire spring clamp. Press the tabs on that spring clamp together to loosen it and pull the drain hose off of the dishwasher drain pump.

Pull the drain hose from under the dishwasher and discard it.

 Tip: If needed, use pliers to squeeze the wire clamp to remove the drain hose.

Step 7: Connect the new drain hose

Attach the new dishwasher drain hose to the drain pump, carefully working the hose onto the drain pump outlet and onto the connection so it seats properly and does not leak. Secure it with the wire hose clamp.

Route the new drain hose through the water inlet bracket the same way the original drain hose was routed. 

Reconnect the portion of the drain hose that goes to the kitchen sink drain to your newly installed drain hose. Make sure that the connection is secure.

 Tip: The new drain hose fits tightly on the drain pump. It usually requires significant force to work the drain hose onto the drain pump outlet.

Step 8: Reinstall the water inlet bracket

Position the water inlet bracket on the side of the tub so  you can screw the plastic nut onto the bracket from the inside of the tub.

Carefully screw the plastic nut onto the water inlet from the inside of the tub. Hand tighten the nut  and then carefully tighten it another 1/4 turn to  seal the inlet.

 Tip: Don't overtighten, which could crack the plastic nut or the tub.

Step 9: Reinstall the dishwasher

Carefully push the dishwasher back under the counter. Reconnect the wires in the junction box and reinstall the junction box cover. Replace the bottom front access panel and toe panel.

Insert the screws into the mounting brackets that secure the dishwasher in the counter and tighten the screws.

Position the toe panel on the dishwasher and then position the access panel in front of the toe panel. Insert the mounting screws and tighten the screws firmly.

 Tip: Refer to the dishwasher's installation guide for additional guidance.

Step 10: Restore the water supply and electrical power

Open the water supply valve to restore the water supply to the dishwasher. Reset the house circuit breaker to restore electrical power.