The ACO Quatrix-K type 3F anti-backflow system is conforming with EN 13564 and intended for use with wastewater containing faecal matter (black water). If, for instance, a toilet is installed below the backflow level, regulations require a type 3F valve to be installed. When backflow occurs from the sewer, the valve's service plate closes automatically and issues an acoustic and visual alarm signal. The actuation is handled by a pneumatic/electrical control.

ACO Quatrix-K black water anti-backflow valves


Main characteristics

  • Anti-backflow valves with polypropylene body
  • For use in the presence of wastewater containing faecal matter (black water)
  • Ideal for new buildings, restorations and upgrading existing installations
  • On-site seal testing per EN 13564
  • With opening for cleaning, inspection and maintenance
  • External electronic control unit (see accessories section)

For in-line installation

  • Anti-backflow valves with polypropylene body for in-line installation
  • Equipped with one automatic closing plate and one manual plate
  • For use in the presence of wastewater containing faecal matter (black water)
  • Ideal for new buildings, restorations and upgrading existing installations
  • On-site seal test per EN 13564 With opening for cleaning, inspection and maintenance
  • With large opening for video inspection (CCTV)
  • With visual and acoustic warning in case of backflow, equipped with emergency batteries
  • External electronic control unit

For floor installation

  • Anti-backflow valves with polypropylene body for floor installation
  • For use in the presence of wastewater containing faecal matter (black water)
  • With height adjustable telescopic raised element and ABS access cover in load class K3
  • Waterproof floor seal guaranteed by an adjustable damp-proof flange
  • Equipped with two automatic closing plates, one of which can be actuated manually in case of emergency
  • With opening for cleaning, inspection and maintenance
  • External electronic control unit

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