Pressure Washers

Nilfisk MH 4M

The MH 4M series takes mid-range hot water high-pressure washers to a new level, meeting the latest productivity demands in the market. The MH 4M is equipped with our industrial NA5 pump with 3 ceramic pistons and a high efficiency 4 pole motor. And the flow activated control system improves user comfort and handling as well as overall machine reliability.

The MH 4M is suited for all hot water slightly heavier cleaning applications up to 4-6 hours use per day and due to the improved fuel saving EcoPower boiler system it offers very high efficiency and quick cleaning.

Service and maintenance can be carried out quickly, as all vital parts are easy to inspect and reach.
Also, the diagnostics function of the 4M will give maintenance warnings to minimise any downtime. Furthermore, service and maintenance can be carried out quickly, as all vital parts are easy to inspect and reach.

The MH 4M concept ensures the most optimal transport concept across a wide variety of surface types with the 4 large wheels and great balance. Optimal accessory storage facilities with double lance holders, turnable hook for easy removal or winding of electrical cable, innovative spray gun holder and easy storage of detergent tanks. Together with the quick service access to all vital parts, this series will provide remarkable cleaning results, saved time and reduced costs.

  • High efficiency 4 pole motors
  • EcoPower boiler with EcoMode function
  • Brass pump head
  • Flow or Pressure activated unloader system
  • Innovative design with 4 big wheels
  • Easy to transport, can even be pushed/pulled across uneven surfaces
  • Diesel oil tank with level sight
  • As standard delivered with 10l external detergent tank (A) and space for an extra tank (B)
  • Low fuel warning system
  • Onboard diagnostics function


Power Type


This product is available for purchase and hire


 Weight (kg) 138
 Length x width x height (mm) 1010x700x1016
 Fuel tank (l) 15
 Pump pressure (bar/MPa) 100/10
 Cleaning impact (kg/force) 2.5
 Water flow Qmax/Qiec (l/h) 680/630
 Max inlet temperature (°C) 40
 Water temperature (water/steam) (°C) 90/150
 Power consumption (kW) 2.9
 Voltage/phase/frequency/current (V/~/HZ/A)                  230/1/50/13
 Fuel consumption ΔT=45°C (kg/h) 2.8
 Cable (m) 5
 Detergent tank (l) A: 10 + B:
 Nozzle size .0475
 Ceramic pistons 3
 Pump (RPM) 1450
 Detergent tank Yes
 SilentPower – 1450 rpm motor Yes
 QuickService – innovative concept Yes
 Ergo accessory system Yes
 Pump oil warning system Yes
 Service indicator Yes
 Parking brake Yes