HATCO ELECTRIC HEATER S-6 FOR DISH AND GLASS WASHERS. The Hatco S Imperial Electric Booster Electric Water Heater combines quality construction and rugged reliability to provide up to 573 GPH (2619 LPH) disinfectant rinse water, with storage capacity 16 gallons (61 liters). This HATCO water heater booster is designed to air dry dishes and utensils instantly to save time, space and money.