Dishwasher

Well over 75% of homes in this country have a dishwasher. Regardless, most homeowners are unaware of the damage and health risks they can cause. Leaks are the more obvious concern, but the problem may not be readily visible. The lack of a properly-installed air gap or “high loop” on the discharge is the #1 defect. It can allow drain waste to contaminate the dishwasher. You must know which rules apply in your area. Connecting  the appliance to the cold water supply is unsanitary. A secure, level installation is required, as well as full functionality.

Inspect for an air gap device or a high loop. The dishwasher’s built-in drain hose loop or a garbage disposer are not a substitute. High loops must be secured at the underside of the countertop. The discharge hose must connect to the drain before the trap. The appliance should be secured to the countertop or cabinet so it can’t tip or shift. Check the interior and close the soap dish before operating it. Do this first when inspecting the kitchen so you can watch for leaks: check back frequently. Did the soap dish open and the unit drain? Is there any damage apparent? Check the basement or crawlspace for water damage underneath.

You must know which rules apply in your area

Air Gap installation

Air Gaps should be installed to drain into the sink if a blockage occurs

“High Loop” installation


The dishwasher does not have an anti-siphon device on the drain line. An air gap or a “high loop” in the drain line prevents wastewater from entering the dishwasher and water supply. Install a “high loop” or an anti-siphon device.

The dishwasher leaks. This affects proper operation and can cause damage. Repair or replace the dishwasher.

The dishwasher does not drain properly during a complete cycle. This affects proper function and can be a health concern. Repair or replace the dishwasher.

The dishwasher discharge backs up into the sink. This implies a partially clogged drain or improper installation of the dishwasher discharge pipe. Hire a plumber for an evaluation and to make repairs as needed.

The dishwasher is plumbed to the cold water supply. This is a sanitary and health risk. Dishwashers must be supplied by hot water. Hire a plumber to connect the dishwasher to the hot water supply.

The dishwasher is not properly secured to the cabinet or the countertop. This is a safety hazard. Secure the dishwasher.

The dishwasher is inoperative. This prevents normal use. Repair or replace the dishwasher.

The dishwasher controls are broken. This affects proper function. Replace the controls.

The dishwasher’s soap dispenser does not operate properly. This is a safety concern that prevents adequate cleaning. Hire a contractor for repairs as needed.

The dishwasher door springs are inoperative. This is a safety concern. Replace the springs.

The dishwasher door does not close properly. This affects proper operation and can allow leaks. Repair or replace the door or replace the dishwasher.

The dishwasher racks are damaged or missing. This affects proper operation. Replace the racks.

The dishwasher isn’t level. This can affect proper operation, and can cause loose connections and leaks. Level the dishwasher.