... 0.55KW~7.5KW constant pressure water supply,set pressure on the keypad directly water pump pressure booster system0.55kw~7.5kw ... 6) unattended, when the call after power, water pumps start automatically, constant pressure control (this feature is optional).(7) automatic ... fault detection, such as the water pressure is too high, too low, too low water level alarm, communications failures, and ...