Series description

Your advantages

  • Easy installation thanks to ready-to-plug system and compact design with various hydraulic connection options
  • Convenient operation and easy setting options thanks to a unique combination of intuitive LCD touch screen operation and a wide range of functions
  • High level of reliability thanks to integrated self-protection routines
  • Hygiene safety thanks to non-return valve and a break tank in accordance with DIN 1989 and EN 1717
  • Easy maintenance with direct access to the system components
  • Quiet operation in residential spaces with smart home integration option

Rainwater utilisation via touchscreen.

The Wilo-RAIN3 is a rainwater utilisation system in accordance with EN 1717 and DIN 1989 standards. Its compactness and versatile hydraulic connection options mean that initial commissioning or replacement is quick and straightforward.

What’s more, it is also extremely convenient and highly reliable thanks to the intuitive user interface of the touch LCD in connection with various intelligent functions such as the self-protection routine.


Ready-to-plug single pump rainwater utilisation system


Rainwater utilisation system is designed for applications that do not require drinking water supply such as:

  • Toilets flushing tanks
  • Washing machines
  • Garden irrigation

(Please check that the application complies with local regulations)


Ready-to-connect module with compact construction, comprising:

  • HiMulti 3 P self-priming centrifugal pump mounted on a base frame with vibration dampers
  • 11 liters break tank for fresh water replenishment with float valve
  • Three-way valve
  • Front and back covers
  • Discharge connection hose Rp 1″
  • Suction connection hose Rp 1″
  • City main water connection R 3/4″
  • 1.5 m power supply cable and plug
  • 4..20mA level sensor with 20m cable for rainwater level monitoring in the storage tank
  • 4..20mA pressure transmitter
  • Overflow sensor installed in the break tank
  • Acoustic alarm
  • Potential free contact available for optional external alarm or failure reporting
  • Relay for optional immersed pump
  • Electronic control switchgear
  • Color LCD touchscreen

Main functions:

  • Fully automatic rainwater utilisation
  • Operation and faults signals
  • Log 10 last failures
  • Pump dry running protection
  • Self priming assistance
  • Automatic break tank water renewal
  • Permanent display of rainwater storage tank level, system discharge pressure, operating status on the controller interface

Scope of delivery

  • Ready-to-connect rainwater utilisation system with fixation material
  • Installation and operating instructions
  • 4..20mA level sensor
  • Sticker ”Do not expose to frost”
  • Sticker ”No drinking water”

Type key




Brand name


Rainwater utilisation system


Product level


Rated volume flow Q in m³/h


Number of impeller


Single phase

Technical data

  • Mains connection: 1~230 V, 50 Hz
  • Power supply cable: 1.5 m length
  • Protection class: IPX4
  • Motor with integrated thermal protection probe
  • Max. operating pressure: 8 bar
  • Triggering pressure: 1.5 bar
  • Negative suction head max.: 8 m
  • Fluid temperature max.: +5 °C to +30 °C
  • Ambient temperature: +5 °C up to +40 °C
  • Break-tank volume 11 liters
  • Nominal connections diameters:
    • Discharge connection Rp 1″ threaded swivel-nut
    • Suction connection Rp 1″ threaded swivel-nut
    • City main water connection on the float valve R 3/4″ (male)


HiMulti 3 P:

  • Pump housing in Technopolymer
  • Impellers and stage casing made of Noryl 30% GF
  • Pump cover and shaft made of stainless steel
  • Mechanical seal made of ceramic/carbon


Ready-to-plug single-pump rainwater-supply unit as compact module for residential and light commercial buildings.

The system fulfils the criteria outlined in DIN 1989 and EN 1717.

All parts that come into contact with the fluid are corrosion resistant.

Duty chart



REACH regulation

Edition 2018-10
Page format 209.9 x 296.7 mm
Number of pages 4

PDF (581 kB)


General overview 2019 International version

Article Number 2200591
Edition 2018
Version number 1
Page format 209.9 x 297.0 mm
Number of pages 74

PDF (42 MB)




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