How should the waste from a single rack commercial type dishwasher be piped?

Waste from a single rack commercial type dishwasher should be piped indirectly to a 2-inch floor sink to ensure compliance with health and safety standards mandated by plumbing codes. This method minimizes the risk of backflow and contamination of the potable water supply, which is essential in commercial kitchen environments.

By utilizing an indirect waste system, the discharge from the dishwasher is routed to a designated floor sink rather than directly connected to the drainage system. This approach allows for the use of an air gap, which acts as a safeguard against potential siphoning of dirty water back into the fresh water supply system.

The size of the floor sink, being 2 inches, is adequate for handling the flow of waste from a single rack dishwasher, thereby promoting effective drainage while minimizing blockages. This configuration adheres to best practices in plumbing design in food service establishments, enhancing sanitation and operational safety.