This undercounter dishwasher has a 17″ door opening. It can wash up to 32 racks per hour, using only 0.74 gals. of water per rack. Detergent and rinse aid pumps. This unit uses hot water to ensure dishes are sanitized. Detergent and rinse aid pumps come standard on this unit . Once the chemicals start to run out, the machine automatically lets you know with its built-in low chemical alarms.