It is of the brand Grundfos- PM1 Electronic Pump Controller Automatic Electronic Pump Controller, Model: Grundfos PM1 The Grundfos PM 1 pressure manager is designed for automatic start/stop control of Grundfos pumps and other water supply pumps. The PM1 is suitable for applications where start/stop of the pump according to consumption is required. It is the basic flexibility solution, offering pump start 1.5 or 2.2 bar. The PM1 starts the pump when the starting pressure is reached, and keeps running as long as there is flow. The PM1 provides dry-running protection and a cycling alarm for increased safety. In addition, it boasts the usual Grundfos quality, high flexibility, robust electronics, and long life. Functioning: Anti Cycling: If there is a minor leakage in the system, or a tap has not been entirely closed, the PM 1 will start and stop the pump periodically. In order to avoid cycling, the anti cycling function of the PM 1 will stop the pump and indicate an alarm. Dry-running protection: The PM 1 incorporates dry-running protection that automatically stops the pump in case of dry running. The dry-running protection functions differently during priming and operation. Dry running during priming.