How to Install a Dishwasher

People who don't know how to install a dishwasher may think it is a task that only professionals, such as plumbers, can do. In fact, with a few tools and a careful study of the instruction manual from the manufacturer, any do-it-yourselfer can complete a dishwasher installation themselves.

What You Need to Install Diswashers
Before you begin the installation, know that there are three connections that a dishwasher needs: a hot-water supply line, a drain hose to connect the dishwasher to the under-sink drainpipe and an electrical supply. If you've already got a dishwasher, you've got the needed connections. If you're installing one in your home for the first time, make sure you've got the needed connections. If not, you'll need to hire a plumber to put in the hot-water supply and an electrician to install an outlet.

When you're ready to install, turn off the circuit breaker and shut off the water supply valve. Push the back of the dishwasher close to the opening under the counter, leaving enough room for you to work.

The Installation Process
Most dishwashers come with a long electrical cord that plugs into an outlet under the sink. There will also be a supply tube and a hose that extend from the back of the dishwasher. Thread the power cord, supply tube and hose through the hole in the cupboards. As you move the dishwasher into place under the counter, take care not to squeeze the lines or kink them in any way. Kinking the hoses could cause leaks or improper operation.

The supply tube from the dishwasher connects to a hot-water valve. This screws in place like a garden hose. The fitting should be tightened with an adjustable wrench. Don't tighten it too much or you'll strip the threads, which can cause leaks. 

The drain hose from the dishwasher will fit onto the sink drain, located near the garbage disposal or the "j" trap if you don't have a disposal. Clamps are used to ensure a tight seal.

Test the installation by running the dishwasher for a few minutes. If it powers on, electricity is reaching the machine. When a rush of water can be heard, the intake supply equipment is working. When the appliance is in the middle of a cycle, draining sounds should be heard near the sink as the water is taken away.

Once the three connections are installed and adjusted, you can adjust the height of the dishwasher by maneuvering the front feet to raise or lower the dishwasher. Be sure that the machine is level from front to back and left to right. A dishwasher on an uneven footing may not work properly.

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