PM1, PM2 Pressure Managers for automatic start-stop of pumps (GE)

The PM1 and PM2 pressure managers are intelligent waterworks that control your pump in accordance with consumption in domestic water supply and booster systems.

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PM1 is for basic flexibility, and PM2 for all-round control if you demand more.



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 from 1.5 or 2.2 bar.

The pump is started when the start pressure is reached, and keeps running as long as there is flow. PM1 provides dry-running protection and a cycling alarm for increased safety. It features the usual Grundfos quality, which guarantees high flexibility, robust electronics and long life.


The PM2 is the all-round control solution, offering adjustable pump start from 1.5 to 5 bar. This enables customisation to different types of installation and desired comfort levels. The start pressure is set inside the unit, whereas current pressure is read on the intuitive LED display.

The PM2 starts the pump when the start pressure is reached, and keeps running as long as there is flow. It is equipped with an internal pressure tank to minimise starts and stops in the event of leakage in the installation.

In addition, the PM2 can be optimised for operation with a large external pressure tank by enabling the 1-bar differential pressure function. This significantly reduces the number of operating hours of the pump in installations with a pressure tank.

Features and benefits

  • User-friendly interface
  • Free choice of installation position
  • Flexible power supply
  • Internal pressure tank (PM 2 only)
  • Power-on indication
  • Pump running indication
  • Alarm indication
  • Dry-running protection
  • Rotary outlet connection
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