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Video:How to Install a Dishwasher

with William Morgan

Learn how to install a dishwasher so that you don't have to spend money or waste time waiting for a professional. Follow this step-by-step guide to learn how to install a dishwasher.See Transcript

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Transcript:How to Install a Dishwasher

Hi, I am William with About.com and today I am going to show you how to install a dishwasher.


Three Main Connections Necessary to Install a Dishwasher

There are three main connections required for dishwasher removal and installation: the water supply, electrical supply and water discharge. Dishwasher installations are pretty simple with a little know-how. Tools you will need include:

  • a crescent wrench
  • a tape measure
  • a screwdriver

Before beginning the removal of an old dishwasher, verify the cabinet dimensions will accommodate the new dishwasher. 



Turn Off the Connections Before You Install a Dishwasher

To begin, turn off the power supply to your dishwasher at the breaker panel. Sometimes dishwashers are plugged into a receptacle but 90 percent of the time they are direct-wired. Next, shut off the water supply valve to the dishwasher and know where the main water valve is to your home before you start in case there is a problem with the dishwasher shut off valve. Disconnect the water supply line from the inlet valve.

Next, disconnect the drain hose from the sink or garbage disposal.
Remove the screws to release the lower access panel and remove the screw to the terminal block cover plate.Now untwist the wire nuts to disconnect the wires. Use a flathead screwdriver to help remove the strain relief nut and then pull the wires out of the junction box. Disconnect the water supply from the inlet valve.

Move the Existing Appliance to Install a Dishwasher

Remove the mounting bracket screws. They are usually anchored to the top of the cabinet. Screw in the front leveling legs to make moving the appliance easier.To avoid damage very carefully tip the dishwasher forward and pull it away from the cabinet while guiding the water and waste lines through the cabinet.

This is the time to replace any water lines, make repairs and clean up the area. Old corroded valves should be replaced. Some dishwashers require that you attach a new drain hose.Drain hoses usually have a universal connection on the end that can be cut and adjusted as needed.

Check the Water Valve Elbows to Install a Dishwasher

There are two main types of water valve elbows on a dishwasher. If it is a male fitting, wrap the threads of the elbow with tape in a clockwise position to prevent leaks before attaching the water supply line. Some dishwashers have a female hose connection that connects to the water line like a simple water hose. In this case the water line is copper tubing with pressure fittings. Connect the water line now while you have easy access.

Reconnect the Appliance to Install a Dishwasher

To reinstall the new dishwasher, feed your drain and water supply connections through the cabinet and carefully move the dishwasher into the cabinet. Secure the mounting brackets to the cabinet or counter top and adjust the leveling screws.Feed the electric lines back through the junction box and secure the strain relief nut. Connect the wires using the wire nuts. Replace the cover plate. Then connect the drain hose to the sink drain or garbage disposal. Reconnect the water supply line. Turn the water supply back on and restore power to your dishwasher.

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