A commercial disposal with a three-inch trap has a fixture rating of what?

A commercial disposal with a three-inch trap has a fixture rating of three. This fixture rating indicates the maximum flow of wastewater that can be effectively managed by that specific trap size without risking overloading the plumbing system.

A three-inch trap is commonly associated with commercial disposals, particularly in food service environments where a higher volume of waste is expected. The rating of three signifies that the disposal can handle considerable waste and water flow, typically reflecting the capacity to manage the discharge from kitchen sinks and similar fixtures.

Understanding trap sizing and fixture ratings is vital for plumbing professionals to ensure that drainage systems are properly designed to prevent clogs and backups, thereby maintaining sanitary conditions. Knowing how these ratings correlate with the size of traps helps in making informed decisions about installations in commercial settings.