Replacing your dishwasher is a relatively simple kitchen repair project that takes just a few hours of your time. Many handy homeowners can do the job themselves, but if you have any doubts about your plumbing abilities, it’s worth hiring an experienced plumber to do the job right.
First, measure both your existing and replacing dishwashers to make sure that the new appliance will fit in your cabinet space without alteration. You may have difficulty getting that old dishwasher out of the cabinet space if the floor in front of it has been built up over time. If you find this is the case, you will either have to remove some flooring or loosen the countertop.
Make sure to turn the electric power off, either at the main panel or unplug the old appliance, and turn off the water at the nearest shut off valve. Disconnect the electrical cable and water line underneath and behind the front panel of the dishwasher.
When removing the 90-degree fitting on the water supply line, remember to put it on the new machine in exactly the same manner so that the water feeds correctly. Remove the drain line under the sink and slide the old machine out of the cabinet. You may need to lower the feet, or hacksaw them off, to get the old machine out of the cabinet.
Reconnect the 90-degree fitting. Be sure to loop the new drain line all the way up to the countertop to avoid backup of sink clogs into the dishwasher. You will need to consult with your local plumbing professional as to possible code requirements of a special air gap fitting in the drain line. Slide the new dishwasher into the cabinet and adjust the feet for proper fit. Reconnect the water supply line and electrical cable; turn the water and power back on, checking for leaks.
