Dennerle CO2 Special Backflow Preventer

The CO2 special backflow protection is used to protect CO2 devices from returning water.

With the CO2 special backflow protection, you reliably and securely protect your CO2 devices from returning aquarium water. The backflow safety device also has a permanently elastic CO2 window special membrane. Install the backflow preventer in the direction of the arrow in your CO2 hose. In contrast to other backflow safeguards such as for air pumps, the special backflow safeguard is specially designed for CO2 pressures.

Our expert Oliver Knott recommends:

With the special backflow protection, it means "Safety first!" - because this small particle can prevent aquarium water from accidentally running back into your valuable CO2 fertiliser system!