Fernco Single Flap Backwater Valve

The Fernco (previously known as Flexseal) Single Flap Backwater Valve, is designed to protect buildings from backwater flooding. It is installed in drainage systems to allow free flow of sewer or surface water in one direction while blocking the backflow in instances of flooding. This is crucial in preventing rainwater from traveling back up the sewerage system into buildings.

• Automatic Operation: The valve operates automatically, requiring no manual intervention for its functioning.
• Maintenance-Free Design: Built to be robust and maintenance-free, reducing long-term care and costs.
• Inspection Access: Features a removable lid for easy inspection.
• Effective Locking Mechanism: Equipped with an easy-to-operate locking mechanism for security and reliability.
• Durable Materials: Constructed with robust materials, including stainless steel flaps, ensuring longevity and efficiency.
• Pest Deterrent: Acts as a deterrent against pests, such as rats and other rodents, enhancing building safety.
• Compliance: Fully complies with the guidelines set out in BS EN 13564.

• Size Range: Available for the most common smooth PVC pipe sizes: 110mm, 160mm, and 200mm.
• Material: Features stainless steel anti-flooding flaps and a specially designed body to minimize blockage risks.
• Testing: 100% tested for safety, complying with BS EN 13564 standards.

The Fernco Single Flap Backwater Valve is designed for straightforward installation:

1. Location: Install the valve in-line along the drainage system, ideally where it can effectively block backflow.
2. Direction: Ensure that it is oriented to allow the free flow of wastewater in the direction of the system mains.
3. Accessibility: Place the valve in a location where its lid can be easily removed for inspection when necessary.

• Single Flap Valve: Contains one flap that blocks backflow. It is typically suitable for smaller-scale or less complex drainage systems where backflow pressure is moderate.
• Double Flap Valve: Features two flaps for added security and efficiency, ideal for systems that experience higher backflow pressures or require more robust protection.