Discover the KARMAT non-return valve, the essential solution for effectively protecting your premises against the backflow of rainwater or wastewater. Ideal for ground-floor buildings, it prevents flooding caused by heavy rain, melting snow or other incidents. Made from high-grade polypropylene, with chromo-nickel stainless steel fastenings, this valve is resistant to sub-zero temperatures, corrosion and chemicals.

Thanks to its manual locking mechanism and self-contained design, it requires no external power supply, ensuring simple, intuitive operation. The flap opens fully, guaranteeing optimum flow, and the flexible seal offers superior resistance to weathering and aging.

Other highlights include protection against rodent penetration, odor control and compliance with European standards PN-EN 13564 with CE marking. Several diameters are available (ø110 to ø315 mm) to suit all installations. Ideal for installation on horizontal pipes or in manholes, the KARMAT non-return valve is the reliable reference for the safety of your drainage systems.