Wilo-DrainLift M


Sewage lifting unit with 1 or 2 integrated pumps


Sewage lifting unit for drainage of residential housing and commercial buildings (e.g. restaurants, department stores, etc.). Raw sewage that cannot be piped to the sewer system through the use of natural inclines and sewage from toilet systems below the backflow level are to be piped to the public sewer system by means of an automatic lifting unit in accordance with DIN EN 12056/ DIN 1986‐100. Sewage containing mineral oils or explosive admixtures must be guided through oil precipitators and/or petrol precipitators; those containing fatty substances must go through grease traps and those with sand through grit chambers. In cases where the flow to the lifting unit must not be interrupted during normal operation, one lifting unit must be equipped with a second pumping unit that has the same performance capacity and switches on automatically when needed (DIN EN 12050‐1 A1).

Type key

Example: Wilo-DrainLift M1/8 (1~) RV
M1 M1 = single-pump system
M2 = double-pump system
/8 Max. delivery head [m]
(1~) 1~: Single-phase version,
3~: Three-phase version
RV Version with non-return valve
without details: Version without non-return valve

Special features/product advantages

  • Space-saving installation
  • Easy-to-install thanks to low weight and large scope of delivery
  • Flexible due to free selection of inlets
  • Operationally reliable with integrated thermic motor protection and mains-independent alarm


  • Motor housing: Stainless steel 1.4301
  • Hydraulic housing: Cast iron EN-GJL-250
  • Impeller: PUR plastic
  • Tank: PE plastic

Technical data

  • Mains connection 1~230 V, 50 Hz or 3~400 V, 50 Hz
  • Power consumption P1 = 1.3 kW
  • Cable length from system to switchgear 4 m / plug cable 1.5 m
  • Operating mode S3-15%, 80 sec
  • Fluid temperature max. 40 °C, for short periods (3 min.) 60 °C
  • Max. ambient temperature of 40 °C
  • Free ball passage 45 mm
  • Pressure port DN 80
  • Inlet connection DN 40 / DN 100 / DN 150
  • Ventilation connection DN 70
  • Min. suction head (installation level to middle of inlet) 180 mm
  • Protection class (without switchgear) IP 67
  • Gross tank volume 62 l to 115 l, depending on type
  • Switching volume 24 l to 40 l, depending on type


  • Ready-to-plug
  • Thermal motor monitoring
  • Level control with float switch
  • Mains-independent alarm
  • Potential-free contact
  • Pump cable detachable
  • Non-return valve (RV version)
  • Inlet seal
  • Hole saw for inlet borehole
  • Hose connection for ventilation
  • Seal for suction pipe connection for diaphragm hand pump
  • Kit for pressure pipe connection
  • Fixation material
  • Soundproofing material
  • Switchgear


Fully submersible sewage lifting unit, ready for connection (flooding height: 2 mWS, overflow time: 7 days) with a gas and watertight collection tank equipped with buoyancy safeguards. Centrifugal pump with vortex impeller.

DrainLift M1/8:

Single-pump system with single-phase or three-phase AC motor for automatic operation. Switchgear with shock-proof or CEE plug, potential-free contact, integrated and mains-independent alarm and adjustable follow-up time.

RV version with non-return valve included in the scope of delivery.

DrainLift M2/8:

Double-pump system for automatic operation (with automatic duty cycling, standby and peak-load operation). Due to the integrated double non-return valve, only one pressure pipe connection is required. Switchgear with shock-proof or CEE plug, potential-free contact, maintenance interval display, early fault detection and integrated and mains-independent alarm and adjustable follow-up time.

Attention: The switchgear is not submersible and must therefore be arranged in such a way that it is overflow-proof.

Scope of delivery

Connection-ready sewage lifting unit, including:

  • Switchgear with mains-independent alarm and plug:
  • 1x inlet seal DN 100
  • 1x hole saw for inlet DN 100
  • 1x lip seal for connection of diaphragm hand pump or inlet connection Ø 50 mm
  • 1x collar for ventilation connection DN 70
  • 1x flange connector DN 80/100 with flat gasket, flexible hose section and fixing material for discharge pipe connection DN 100
  • 1x DN 80 non-return valve (only for M1/8RV and M2/8)
  • Sound absorption strips for sound insulation installation
  • 9 V rechargeable battery
  • Fixation material
  • Installation and operating instructions