Grundfos Magna1 25-40/180

Circulation Pump of the highest quality for medium-sized systems.
In stock
  • Order before 17:00pm, delivered on 24-10-2020
  • 2 year warranty
  • 30-day reflection period
  • Customers reviewed with a /
Specifications overview
  • Overall dimensions 180 mm
  • Screw connection 1 ½"
More specifications »

Discount packages for the Grundfos Magna1 25-40/180

Specifications overview
  • Overall dimensions 180 mm
  • Screw connection 1 ½"
More specifications »
Stephen Tip by Stephen

If you are looking for a similar pump of the same quality but in a lower price range, you are advised to opt for the DAB Evoplus 40/180 M.

Pros and cons
  • You can easily replace the old central heating pump yourself; view our video
  • Find your current central heating pump in the replacement table
  • Extremely energy efficient

The Grundfos Magna1 25-40/180, a circulation pump in the latest Grundfos Magna series, has been designed for domestic heating systems, central heating, underfloor heating, geothermal heat pump systems, and domestic hot tap-water systems. By means of the latest technologies, this circulation pump saves considerably more energy than the older Grundfos models. The central heating pump has a user-friendly operating panel with one button to operate the entire device, and is also fitted with a 'Grundfos Eye' indicator light that provides information about the actual pump status (in operation / error).

Setting the Grundfos Magna1

  • Proportional-pressure curve: first option (with three volume settings)
  • Constant-pressure curve: second option (with three volume settings)
  • Constant curve/constant speed I (= lowest setting)
  • Constant curve/constant speed II (= intermediate setting)
  • Constant curve/constant speed III (= highest setting)

Which pump setting for which situation?

The selected setting depends on your personal situation.

  • Only radiators: proportional pressure
  • Underfloor heating or underfloor heating + radiators: constant pressure
  • No regulation, like the old pump with three settings: constant speed (settings I, II, and III)

Whether the high or low setting should be used depends on the capacity required for your system, which differs on the basis of the environment.

Contents of the kit

  • Grundfos Magna1 25-40/180 Circulation Pump
  • two gaskets (rubber rings)
  • manual

Replacing your old circulation pump / central heating pump

Because of its identical size, your old circulation pump can easily be replaced by a new one. Any handyman can do this, because all you need are water pump pliers; view our video. You can easily find your old pump in the replacement table.

General information

Product package - Grundfos Magna1 25-40/180 Circulation Pump
- Two gaskets (rubber rings)
- Manual
Warranty 2 year warranty
SKU 5712608941894

Physical specifications

Material Cast Iron
Weight 4,5 kg

Technical information

Power consumption 56 Watt
Max. temperature of liquid -10°C - 110°C


Pump type Circulation pump
Max. pump capacity 6,200 l/h
Max. delivery head 4,3 metres
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