The CMA Pre-Wash System eliminates the manual overhead pre-rinse system by utilizing the wash water that is normally lost down the drain. With the velocity (35 gallons per minute) of hot, soapy water bombarding your dish rack from all angles (that can only be accomplished in an enclosed chamber), you will experience effortless, thorough pre-rinsing. The CMA Pre-Wash System has the unique soil purging system that sends 40% of the floating soil into an external scrap trap.