When the device is started for the first time, it is connected to a power supply which must have a grouding. If it does not have one, a grounding rod shall be supplied which is attached to the back side of the device. The device is connected to a water supply and a wastewater drainage system.
2. You can maintain the device yourself
As the owner of the device you will get access to online video material that accurately describes simple steps how to maintain the unit. The materials used are robust, most of them are indestructible. A vital part is a special heavy duty industrial grade brush with professional bristles which will wear out not earlier than in two years of regular use, but it can withstand the for many more years to come.