PM1, PM2 Pressure Managers



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

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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  • User-friendly interface
  • Free choice of installation position
  • Flexible power supply




Product Brochure

Publication no.: 97503636

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4,8 MB



Information and Advice:

Grundfos is a world-wide provider of pumps and related systems. We have a highly educated and trained staff of service engineers who will be able to support you during the installation phase of the pump or the solution. Grundfos supplies high-quality products, but to maintain a long life of the product or the system we have many years of experience in different kinds of installations and have achieved good practice in installation techniques.

We will be able to support you with the following elements:

  • Information about a proper protection of our pump.
  • Physical placement of the pump to maintain necessary service/repair.
  • Physical placement of the pump to maintain proper operation.
  • Correct cabling to fulfil the requirements of good practice and Electro Magnetic Compliance

Do not hesitate to contact your local Grundfos company to obtain full support for your new installation.

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A Grundfos Service Agreement ensures efficient and uninterrupted operation of your pump system and gives you access to Grundfos Service Centres and authorised Service Partners worldwide, 24 hours a day.

Prevention is better and more cost effective than cure

Once you have purchased your pump, you want it functioning efficiently and reliably, and a formal Service Agreement with Grundfos gives you peace of mind. It also makes sound economic sense, giving you a firm overview of your maintenance budget and access to substantial discounts.

You simply combine a range of service to suit your needs – and let us carry out scheduled maintenance visits to prevent downtime. We offer three types of Service Agreements available for all pumps:

  • Basic
  • Extended
  • Total

Whichever you choose, you will be serviced by specially trained staff at all times.

The cost effective choice

Well-maintained pumps can reduce your energy consumption by up to 50% and in a series of pumps working together one faulty pump can affect all the others. A Grundfos Service Agreement keeps your total cost of owning a pump at a minimum, because our careful consideration of the Life- Cycle Cost of all our products means that we have control over the real costs of ownership of our pumps.

Signing up for a Service Agreement and letting our highly skilled service technicians service your pumps is your safeguard against unforeseen expenditure. Regular servicing and maintenance of your pumps ensure that they are working with optimum efficiency.

Grundfos Service will maintain and repair your pumps and our service professionals can advise you on efficiency issues, offering suggestions for saving money in the long term.

Repair and maintenance of your existing pumps system

Of course, you can always call Grundfos for repair and maintenance of pumps you have purchased from us. Grundfos can repair your pumps to the same specifications as new pumps, but it is important to remember that an upgrade or even a replacement pump can be cheaper than repair in the long term. See Upgrades and Replacement for how this makes good business sense.

Effective service – wherever you are

Grundfos Service is always close by. Together with our local authorised service partners, we offer worldwide service, and help from qualified pump professionals is never far away, whether you need immediate assistance or you are interested in hearing about your savings possibilities.

Grundfos Remote Management is a cost-effective, secure and reliable way to monitor and manage pump installations from an Internet PC at a very low price.

Connecting pumps and people

With a secure and reliable remote management system, you can monitor and manage your pump systems from an Internet PC at a very low price.

Grundfos Remote Management is a cost-effective and straightforward way to monitor and manage pump installations in commercial buildings and in water supply and wastewater infrastructure. It reduces the need for onsite inspections, and in the event of an alarm or warning, the relevant people are notified directly.

Compared with mobile phone-based monitoring, the system offers a wider range of benefits and functionalities. For those who do not require remote process automation, Grundfos Remote Management is the ideal solution for monitoring and remote control as opposed to traditional SCADA (Supervisory Control and Data Acquisition) systems. Initial investment is minimal, and a fixed low fee covers data traffic, hosting costs and system support, including back-up of all data.

Efficient alarm management

Via its on-call schedule, this new telemetry system ensures that alarms from onsite controllers go directly to the relevant people. From a PC anywhere, the system manager can log on and plan who is to receive alarm messages from each installation at any given time of the day. Managers can plan years ahead and easily handle daily exceptions to the schedule.

Optimize service and maintenance

Changes in pump performance can be tracked using trend graphs automatically generated by the system. This can give an indication of wear or damage in the installation, and service and maintenance can be planned accordingly.

The communication interface (the CIU27 modem) enables data transmission via GPRS/SMS from your Grundfos pumps and controllers. The built-in multi-purpose I/O board allows you to connect sensors and switches.

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The purpose of CAPS is to offer a complete tool that contains an extensive catalogue of Grundfos products and a sizing programme to select the most suitable pump for your application.

On top of that there is a comprehensive pump replacement function for central heating circulating, hot water pumps and the wastewater S pumps and the possibility of producing professional quotations including curves, drawings, quotation texts, wiring diagrams etc.
It is possible to export all this in the most popular file formats including gif, bmp, txt, dxf, etc.

Last but not least the programme contains the instruction and operating manuals for nearly all pumps of Grundfos in multiple languages. Service drawings, exploded views and parts lists are available for all sewage products as well as several other pump types.

CAPS is available in two versions: WinCAPS is available on a CD-ROM and the online version called WebCAPS is available at the Grundfos website. Additional features in WebCAPS include CAD Drawings and Literature.

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Spare parts

Spare Parts

BE Responsible is one of our key drivers in Grundfos. It is therefore essential to us, that our pumps are developed with a low energy consumption and the highest possible performance throughout their life. Therefore, Grundfos Service Offerings including spare parts and replacement kits are defined already in the development phase.
Customized service offerings, online ordering and rapid response distribution centres ensure you to have the parts when you need them.

Recommended Spare Parts List.
The list specifies the parts you should have on site to service your pumps. These recommendations can be found at the product site in our WEB Caps tool.

Specially Designed Service Kits.
Service Kits include everything you need for a specific maintenance or repair task, including instructions for dismantling, replacement and reassembly.

24-hour Spare Part Delivery Service.
To be extra sure you do not have to wait, we can set aside a stock of your operation critical spare parts. This will make them available for you, whenever you need them. Link - Online order form

10-year Guarantee
Spare parts for the Grundfos pump you buy today will still be available for 10 years - this is our guarantee to you.

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