- ACO Type 0 backflow stops
- For rainwater harvesting systems
- One automatic pendulum flap
- Nominal size: DN 100 / DN 125 / DN 150
Triplex for water without faecal matter
Type 0 single backflow stops

Type 1 single backflow stops

- ACO Type 1 backflow stops
- For rainwater harvesting systems
- One automatic pendulum flap
- With emergency valve
- Nominal size: DN 100 / DN 125 / DN 150
Type 2 double backflow stops

- ACO Type 2 backflow stops
- For rainwater harvesting systems and non-faecal wastewater
- Two automatic pendulum flaps
- With emergency valve
- Nominal size: DN 50 – DN 150