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How to Install Your New Dishwasher

Whirlpool Gold Series Top Control Dishwasher in Monochromatic Stainless Steel with Stainless Steel Tub


Most homeowners think installing a new dishwasher is a project best left to a professional. However the job is really not all that difficult and can be performed in just an hour or two.


So let’s take a look at the steps.


Removing your Old Dishwasher:


1. Unplug the dishwasher cord, or if it’s hardwired turn off the breaker that controls the dishwasher circuit. Try starting the dishwasher to assure the power is off.


2. Shut off the water supply to the dishwasher, in most homes the shut off or angle stop as it is called is under the kitchen sink on the hot water side, which is always the left side. If there is no shut off you may have to shut off the water supply at the water meter or where the water service line enters your house.


3. Once the water is shut off disconnect the dishwasher water supply line from the shutoff valve. If the supply line is solid copper it may be reused on the new dishwasher. If it plastic or braided stainless steel, it should be replaced. Use a small pan to capture any water left in the lines.


4. Disconnect the dishwasher drain hose; this in most installations is attached to the dishwasher air gap which is on the sink top, remove the line from below. If no air gap is in place the drain line will be attached to the garbage disposer inlet.


5. Remove the bottom access panel from the dishwasher, this is usually held in place by two screws. Once the panel is off, disconnect the water supply line at the dishwasher inlet valve. Next remove the cover from the electrical junction box and disconnect the electrical connections, these are tied together with wire nuts if the unit is hard wired, or disconnect the cord if that is how it was originally installed.


6. Open the dishwasher door, inside at the top of the dishwasher are two mounting brackets, these hold the dishwasher in place. Remove the screws and bend the brackets down away from the underside of the counter top. Now carefully slide the dishwasher out of the opening, checking to make sure the drain hose and water supply line are not kinked or caught on the dishwasher body. The old drain hose will still be attached to the dishwasher.

Some dishwashers will have side mounts, these are required with granite or other stone counter tops.

Remove the old power cord and water supply line from the opening and clean the area as necessary. A new drain hose is supplied with the new dishwasher.


Installing the New Dishwasher:


1. Unbox the new dishwasher and check the installation instructions for the specific cutout or opening size requirements. Make sure the new unit will fit your opening. If your opening is too small, you will have to modify the opening or exchange the dishwasher for a different model.


2. While the dishwasher is still out of the opening, now is the time to attach the new water supply line and power cord while access is easy. Attach the new water supply line to the inlet valve and attach the power cord to the leads in the junction box and replace the cover. Your dishwasher installation instructions will show the locations. 



Using a stainless steel braided water supply line makes the job much easier, it's very flexible and easy to feed into the opening and through the cabinet to the water shut off.

A new water supply line should be used to assure a leak free installation. Using the old water supply line is a false economy; if it fails after the installation your whole house

could be flooded. If not already installed attach the new drain hose to the dishwasher.

3. Attach the two supplied mounting brackets to the top of the dishwasher and secure them. They will hold the dishwasher in place once it is installed. Slide the dishwasher up to the opening and feed into the opening the drain hose, water supply line and cord, run them through the cabinet opening into the under sink area where they will be connected.


4. Slide the dishwasher into place making sure it is properly aligned with the cabinet opening. Adjust the legs to the proper height and level the dishwasher. 


5. Attach the drain hose to the air gap, attach the water supply line to the shut off and place the power cord near the outlet making sure it reaches, but don’t plug it in yet. If the dishwasher is hard wired attach the wiring to the dishwasher junction box and replace the cover, turn on the breaker controlling the dishwasher power only after you have checked for leaks.


6. Turn the water on and check for leaks, if all is OK, plug in the power cord  or turn on the breaker and start the dishwasher, check the water and drain lines for leaks. Once the leak test is complete continue with the install.


7. Attach the mounting brackets to the underside of the cabinet to secure the dishwasher in place. Look one last time for any leaks and replace he dishwashers’ lower front kick panel using the supplied screws to secure it into place. Some installations will require side mounts, these are available from the manufacturer of the dishwasher.


8. Do a final inspection of all of the connections to assure there are no leaks or electrical issues and start washing your dishes!


Congratulations! You just saved $150.00 to $200.00 dollars by installing your new dishwasher yourself!



Mike, The Home Depot Answer Man

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Posted 2015-08-10T22:15:38+0000  by Mike_HD_OC Mike_HD_OC