Wilo-RainSystem AF Comfort - Rainwater Harvesting

Rainwater utilisation in single- family houses for reducing potable water consumption in connection with cisterns or tanks.

Type key Example:
AF Automatic rainwater utilisation and potable water
replenishment installation (Aqua Feed)
MC self-priming, horizontal, multistage rotodynamic pump
of the MulticCargo MC series
3 04 Flow volume [m3/h]
at optimum efficiency
3 04 Number of stages
EM Single-phase AC motor
1~230 V, 50 Hz
Quick Specs:


Rainwater utilisation in single- family houses for reducing potable water consumption in connection with cisterns or tanks.

  • Toilet flushing
  • Sprinkling/irrigation
  • Supplying machinery
  • Secondary cleaning purposes and other applications in the non-potable water sector


Ready-to-plug single-pump water supply system as compact module for single-family houses. For completely automatic supplying of rainwater from an underground tank or from a cistern. The 11-litre replenishment vessel offers optimised replenishment of potable water into the consumer network when cisterns are not full. Automatic Switchover to potable water replenishment, pump operating time-dependent water replacement in the replenishment vessel, anti-lime deposit protection through automatic actuation of the solenoid valve, built-in automatic switch-off during dry running. Variable switch-off pressure. Commissioning with base parameters set ex-works (plug & play) by means of the RainControl Economy RCE electronic control device. Permanent operating data recording, energy-saving mode function, operating state protocol. Operation and parameterisation by means of user-friendly, menu-driven function keys. The system fulfils the criteria outlined in DIN 1989 and in EN 1717.


  • Overflow signalling device

Scope of delivery

Connection-ready module in compact construction. Complete electrical and hydraulic switching and base-frame mounting. Comprising:

  • Self-priming, corrosion-free, low-noise rotodynamic pump of the MultiCargo MC series
  • Pressure side pipework R 1
  • Potable water replenishment vessel (11 l) with float valve
  • 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 back-up warning as standard equipment
  • Cover made of EPP
  • EPP-coated base frame, protected against corrosion
  • 3.0 m connection cable and power plug
  • Fixation material including assembly diagram, Installation and operating instructions and packaging.

Planning Guide

The suction line is to be laid in an uninterrupted rise from the cistern to the AF system. A clearance of at least 200 mm is to be provided for above the system for correction purposes. A clearance of at least 100 mm is to be provided for to the left of the system in order to ensure ventilation of the pump motor. For additional planning instructions and/or details concerning the planning of rainwater utilisation systems, see Wilo-Brain “Rainwater Technology Handbook”.

Product advantages

  • Compact, ready-to-plug rainwater utilisation system
  • Low-noise, thanks to multistage rotodynamic pump and complete encapsulation of the system
  • Automatic support function for evacuation of air from the suction line
  • In compliance with DIN 1989 and EN 1717
  • Upholding of previous performance parameters; this ensures that interchangeability with previous systems will be maintained
  • High economic efficiency, thanks to fresh water replenishment according to requirements


Residential Customers



Local Authority




New Building Developments

Industrial Estates

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