H44X rubber flap valve consists of body, bonnet and rubber flap composed of three main parts. Where the rubber flap from steel, steel bars and reinforced nylon do substrate coated outer layer made of rubber, valve switch life of up to one million times, in order to prevent backflow and Aquatic pump damage. The valve can be installed by access to water in the reservoir next to the channel, in order to prevent the water back to the water system. Guanlong valve (Kunshan) Co., Ltd. Address: Yushan Town Industrial Park Enterprise Tel: 0512-66957822 sales headquarters Longsheng Road, Shanghai No. 550 Sales Hotline: 021-61316988 61316899 Mobile: 18930261811