Talk with the Expert | International and European shipping | Free Shipping for Orders over 69€ | Shipping within 24 hours
CO₂ CHECK VALVE – Backflow Protection for Aquarium Fertilization Systems
The Dennerle CO₂ Check Valve is an essential safety component designed to prevent backflow of water into your CO₂ equipment. It ensures long-term protection of pressure regulators, bubble counters, and solenoid valves by blocking water from flowing backward into your system, especially during power outages or system shutdowns.
Equipped with a special CO₂-resistant membrane, this valve offers durable and leak-free operation, even at the low pressures typical of aquarium CO₂ setups. Manufactured in Germany to high-quality standards, it provides reliable and secure performance for advanced planted aquariums.
The valve is compatible with all systems using standard 4 mm inner diameter (6 mm outer) tubing and is easy to install. Its compact design allows integration into any setup without clutter or interference.
Key features:
Anti-backflow valve for aquarium CO₂ systems
Prevents water from damaging sensitive equipment
Special membrane highly resistant to CO₂ corrosion
Protects regulators, solenoids, and bubble counters
Fits 4 mm ID (6 mm OD) tubing
High-quality construction, made in Germany
Easy to install and maintain
Why choose the Dennerle CO₂ Check Valve:
A must-have for every CO₂ system, this valve offers critical protection against water backflow, ensuring your devices remain functional and corrosion-free. It helps preserve your equipment and maintain aquarium safety, making it an essential part of any CO₂ fertilization setup.
English 
Italiano 
