Key Features

• Automatic Backflow Prevention: The primary function, achieved through a non-return flap mechanism, automatically stops the reverse flow of sewage and wastewater to protect property from flooding and contamination during sewer surcharges or heavy rains.

• Durable Construction: Made from heavy-duty, high-density polyvinyl chloride (PVC), the valve is resistant to corrosion, chemicals, and physical damage, including rodent bites, ensuring a long service life.

• Pest and Odor Barrier: The secure sealing and flap design effectively block rodents, insects (like cockroaches), and snakes from entering the building through the drainage system, while also containing unpleasant sewer gases and smells.

• Standard Compatibility: With a 140mm (5-inch) diameter, these valves are designed for compatibility with standard residential and commercial PVC drainage pipes, making them a practical choice for various applications.

• Easy Installation and Maintenance: Many models feature a simple push-fit or easy-to-install design that does not require special tools or a plumber for basic setup. They also often have a removable top or inspection cover for convenient cleaning and servicing.