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Wilo-RainSystem AF Comfort

Series description

Your advantages

  • Compact, ready-to-plug rainwater utilisation system according to DIN 1989 and EN 1717
  • Tested according to RAL-GZ 994 quality standard
  • Low-noise, due to multi-stage centrifugal pump and complete encapsulation of the system
  • Automatic support function for evacuation of the air from the suction line
  • High economic efficiency due to fresh water replenishment according to requirements


Ready-to-plug rainwater utilisation system


Rainwater utilisation for saving drinking water in conjunction with cisterns or tanks


  • Connection-ready module with compact construction
  • Electrical and hydraulic connections already in place, mounted on corrosion-protected base frame.
  • Comprising:
    • Self-priming, corrosion-free, low-noise MultiCargo MC centrifugal pump
    • Pressure-side pipework R 1
    • Drinking water replenishment reservoir (11 l) with float valve
    • Cover made of EPP
    • 3.0 m connecting cable and mains plug
    • Rain Control Economy RCE central switchgear with control electronics including solenoid valve and pressure transmitter, 4-20 mA and level sensor with 20 m cable for level indicator
    • Connection for overflow signalling device and/or backflow warning as standard
    • Menu-prompted operation and LCD display
    • Operation and fault signals
    • Automatic water exchange in the replenishment reservoir
    • Automatic prevention of lime deposits on the solenoid valve
    • Permanent display of rainwater storage tank level, system pressure, operating status via LCD

Scope of delivery

  • Heavy-duty, ready-to-connect single-pump rainwater utilisation system with 3.0 m connecting cable and mains plug, RainControl Economy central switchgear with control electronics, level sensor with 20 m cable, measurement range 0-5 m
  • Including cover and connection kit for replenishment overflow made of recyclable EPP

Type key


Wilo-AF Comfort MC 304 EM


Automatic rainwater utilisation and drinking water replenishment system (Aqua Feed)


Self-priming, horizontal, multistage centrifugal pump of the series MultiCargo MC


Volume flow (m3/h) at optimum efficiency


Number of stages


Single-phase AC motor 1~230 V, 50 Hz

Technical data

  • Mains connection 1~230 V, 50 Hz
  • Suction head max. 8 m
  • Operating pressure max. 8 bar
  • Protection class IP 42
  • Connections:
    • Pressure pipe/pressure side Rp 1
    • Suction side R 1/ G 1
    • Drinking water replenishment R ¾
    • Connection overflow DN 70


  • Pump housing stainless steel 1.4301
  • Impeller made of Noryl
  • Shaft stainless steel 1.4028
  • Mechanical seal made of ceramic/carbon
  • Stage chambers made of Noryl


  • Ready-to-plug single-pump water-supply unit as compact module for single-family houses
  • Fully automatic supply of rainwater from an underground storage tank or rainwater storage
  • 11-litre replenishment reservoir for optimised replenishment of drinking water into the consumer network when rainwater storage tank is not full
  • System fulfils the criteria outlined in DIN 1989 and EN 1717
  • Automatic switchover to drinking water replenishment, time-sensitive water exchange in replenishment reservoir, built-in automatic switch-off during dry run.
  • AF Comfort system control: RainControl Economy RCE electronic control device with additional functions such as:
    • Automatic solenoid valve actuation to prevent lime deposits
    • Variable switch-off pressure
    • Commissioning with factory-configured basic parameters (plug & pump)
    • Continuous logging of operating data
    • Economy mode function
    • Operating status log
    • Operation and parameterisation by means of menu-driven function keys
  • Cover


REACH regulation

Edition 2019-10
Page format 209.9 x 296.7 mm
Number of pages 4

PDF (853 kB)


General overview 2020 International version

Edition 2020
Version number 1
Page format 209.9 x 297.0 mm
Number of pages 78

PDF (48 MB)


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)



PDF: Wilo-RainSystem AF Comfort


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