How to Install an Under-counter Dishwasher

What You'll Need
New dishwasher
Installation kit
Teflon tape
1/2-Inch copper pipe
1/2-inch compression fittings
Wire nuts
2-inch hole saw

An under-counter dishwasher is a great appliance that you can use to wash your dishes while also saving space in your kitchen. Being able to be installed under a counter might mean that you lose some cabinet space, but you will not lose any floor space. The installation of the under counter dishwasher is not a difficult project but does require some plumbing and electrical work. Here are some steps to follow to install your new dishwasher.

Step 1: Shut Off Water and Power

Since the installation of the under-counter dishwasher is going to require working with both the water supply and electricity, you will need to shut both of these things off. Use the shut-off valves under the sink and shut off the electricity at the breaker.

Step 2: Drill Hole in Floor

Using your drill and the 2-inch hole saw, drill a hole in the floor. This hole should be 2-inches away from the back wall and on the left side. Hold the drill perfectly perpendicular and apply pressure to drive the hole saw through the flooring.

Step 3: Connect Water Supply Tubes

Move under the sink and cut the water supply tubes that are going to the faucet. You will be using this water supply for your dishwasher. Splice in your new copper tubing for both the hot and cold water and run them towards the cabinet where the dishwasher is. You may need to run them under the existing cabinets. Lay the pipes on the floor and use elbows to position them under the sink.

Step 4: Connect Wires to Junction Box

Locate a junction box in the basement, or in the kitchen, near the area where you are installing the dishwasher. Run the electrical harness through the hole in the floor to the box. Connect the power wires to the wires in the junction box with the use of wire nuts.

Step 5: Connect Drain to Sink Drain

Cut the sink drain above the P-Trap and connect the soft hose into a 'T' fitting. Use the hose clamp and make sure it is solidly connected.

Step 6: Connect Water Pipes to Dishwasher

At the ends of the copper tubing place a compression fitting and a ferrule. Place teflon tape over the ends of the threads on the ferrule and connect the tubes to the dishwasher. Tighten the compression nuts with the adjustable pliers.

Step 7: Slide Dishwasher into Place

Once the connections are made then you can slide the dishwasher into place. Make sure that the wire, and the water, connections are not kinked or disconnected during the process.

Step 8: Level Dishwasher

With the under counter dishwasher in place place a level on a top section. Make sure that it is level. Adjust the front legs accordingly to get the dishwasher into a level position. You may need to use some wood blocking in the rear if your floor is severely out of level.

Step 9: Test Dishwasher

Turn the water and the power back on and run the dishwasher through a cycle. Check the connections for any signs of leaks.