Installing a dishwasher involves preparing the site; connecting the water, electrical and drain lines; and mounting the dishwasher in place. Before mounting a dishwasher, measure the opening to ensure it has sufficient volume, and drill any holes necessary to accommodate the water supply, electrical wires and waste drainage. Mounting a dishwasher is typically accomplished with screws or bolts that attach the appliance to the surrounding counter frame.
Many local building codes require dishwashers to utilize an air gap to prevent the siphoning of water from the sink drain or disposal. Mount the air gap using one of the existing sink holes, or drill a new hole for it in the countertop. Connect drainpipes to the air gab, and use hose or spring clamps to ensure a secure fitting. Drainpipes should also connect to the inlet of the garbage disposal. Additionally, remember to turn off the water supply before installing the dishwasher supply and hot water lines.
Cut power to the dishwasher at the circuit breaker before wiring the electrical supply. Run the electrical cables through the back of the electrical box mounted to the dishwasher, and connect the wires to the corresponding terminals using the appropriate hardware. Test water supply lines, drainage outlets and electrical connections to ensure proper functioning before mounting the dishwasher.