Fernco Flap Valves

Fernco Flap Valves are one-way, non-return valves designed for installation at the open end of a pipeline or culvert. They allow downstream water to discharge while helping prevent rising external water levels from flowing back into the system and flooding the protected area.

Made from corrosion-resistant high-density polyethylene (HDPE), the valves are lightweight, UV-stable, fully recyclable and designed for low opening pressure. Their component construction supports replacement of parts where required, while integrated watertight seals simplify installation without the need for grout between the frame and wall.

Key features

• Low cracking heads
• Robust, rigid and corrosion-resistant construction
• Quick installation with pre-installed watertight sealing
• Little to no maintenance required
• Available in wall-mounted and spigot-mounted configurations; flange-mounted options available on request
• Standard size range: DN100–DN1500

Choose the appropriate model and mounting configuration for your pipe size and site requirements.