Non-return valve intended for installation on horizontal sections of pipework in drainage catch pit both outside and inside buildings, providing backwater and flooding protection.

The valves protect a building from backwater of the drainage system. The valves operate automatically allowing free drainage of rain water according to the slope of a drain system channel. 

Advantages:

• Non-return valves effectively protect buildings from backwater (backflow) of rain water of drain system
• reliable and maintenance-free
• Non-return valves are equipped with automatic closing system that starts to operate when backwater appears
• Non-return valves are equipped with emergency manually-operated closing system,
• Non-return valves effectively protect a building from unpleasant odors getting inside a building when drain and sewerage systems are not used for longer periods
• Non-return valves reduce the risk of rodents getting inside a building through drain and sewerage systems
• Non-return valves are made of materials of high resistance to aggressive substances
• Non-return valves provide easy method of cover removing for performance of periodic maintenance of flaps
• Non-return valve body design reduces the risk of solid waste formation blocking, in this way, the flap inside the body.