Wall Mounted Flap Valve

Fernco FV Wall Mounted Flap Valves

Our Fernco FV Wall Mounted Flap Valves are a simple and effective way to help prevent water flowing back through drainage, surface water and wastewater systems.

Fitted directly to a suitable flat wall or headwall at the end of a drainage outlet, the valve works automatically without the need for power or manual operation. When water is flowing in the right direction, the flap opens to allow it to discharge. If the water level outside rises or the flow starts to reverse, the flap closes, helping to stop water travelling back up the pipe.

This makes the Fernco FV range particularly useful for drainage outfalls, flood protection schemes, surface water systems and other locations where changing water levels could cause backflow.

Simple & Reliable Backflow Protection

One of the main advantages of a flap valve is its simplicity. There are no complicated controls or electrical components – the movement of the water operates the valve.

Under normal conditions, water leaving the drainage system pushes the flap open. Once the flow stops, or pressure starts coming from the opposite direction, the flap closes against the outlet.

This provides an effective first line of defence against unwanted backflow and can help protect the drainage system and surrounding area when external water levels rise.

Strong HDPE Without the Extra Weight

Fernco FV Wall Mounted Flap Valves are manufactured from durable HDPE, giving them the strength required for drainage and water management applications while keeping the overall valve relatively lightweight.

This can make a real difference during installation. Compared with heavier traditional materials, HDPE valves are easier to transport, lift, position and secure, particularly when access to the installation area is limited.

HDPE is also well suited to outdoor and wet environments, providing excellent resistance to the conditions regularly found around drainage outlets, headwalls and watercourses.

Designed to Make Installation Easier

The Fernco FV range features an integrated co-extrusion seal, helping make installation quicker and more straightforward.

The seal removes the need to apply additional tapes or sealants between the valve and mounting surface, reducing the number of installation steps and helping achieve a consistent seal.

Once installed, the valve requires relatively little attention beyond regular inspection and appropriate maintenance.

Wall Mounted Flap Valve Sizes

The Fernco FV range covers a wide selection of sizes, making it suitable for everything from smaller drainage outlets through to larger surface water and infrastructure applications.

Available options include:

• FV100
• FV125
• FV150
• FV200
• FV225
• FV250
• FV300
• FV350
• FV400
• FV450
• FV500
• FV600

With twelve sizes available, it's easier to match the flap valve to the requirements of the drainage system rather than trying to make a limited range of standard sizes fit the application.

Suitable for a Wide Range of Applications

Fernco FV Wall Mounted Flap Valves can be used anywhere there is a need to allow water to discharge while helping prevent it from returning through the same outlet.

Typical applications include:

• Surface water drainage
• Drainage outfalls
• Headwalls
• Stormwater systems
• Wastewater applications
• Flood prevention schemes
• Culvert outlets
• Rivers and watercourses
• Civil engineering projects
• Commercial and infrastructure drainage

They are particularly useful in areas where the external water level can change considerably following heavy rainfall, flooding or changes in river and watercourse levels.

Built for Long-Term Use

A flap valve is often installed in a location where you want it to keep doing its job for many years without unnecessary maintenance.

The durable HDPE construction of the Fernco FV range helps provide long-term resistance to environmental conditions without the corrosion problems associated with some traditional materials.

With regular inspections and the appropriate maintenance, Fernco HDPE Flap Valves can provide a life expectancy of up to 50 years.

Key Features

• Helps prevent backflow through drainage systems
• Automatically opens and closes with water flow
• No electricity or manual operation required
• Strong and lightweight HDPE construction
• Easier to handle and install than heavier alternatives
• Integrated co-extrusion sealing system
• No additional sealing tapes or sealants required
• Suitable for wall and headwall installations
• Wide choice of sizes from FV100 to FV600
• Suitable for surface water and wastewater applications
• Ideal for drainage outfalls and flood protection
• Resistant to demanding outdoor conditions
• Low ongoing maintenance requirements
• Up to 50-year life expectancy with appropriate inspection and maintenance

A Practical Solution for Protecting Drainage Systems

Whether you're dealing with a small drainage outlet or a larger surface water project, the Fernco FV Wall Mounted Flap Valve range provides a straightforward solution to a common problem – letting water out while helping stop it from coming back.

With a choice of sizes from FV100 through to FV600, lightweight HDPE construction and a design that works automatically, the range is suitable for contractors, drainage professionals, civil engineers and water management projects where dependable backflow and flood protection is required.

Choose the appropriate Fernco FV Wall Mounted Flap Valve for your installation, or contact us if you need help selecting the right size for your drainage or water management project.