Hi Victoria. Thank you for your question. The 500 Series Washer and Dryer include the cold and hot water hoses, electric power cords for washer and dryer. The washer power cord plugs into the dryer and the dryer has a four-prong plug, which can be changed to a three-prong plug by the installer. We have two stacking kits available for this unit. They are WTZ20410UC, which is a standard stacking kit and WTZ11400UC, which has a pull-out tray.