Backflow Preventers - China

A pest control company contaminated the water supply when it used the insecticide to kill termites.

The company USES water from garden pipes to mix chlordane and heptachlor in tanker trucks.

The end of the hose is immersed in the chemicals, while water pipes in the area are draining.

When the plumber inserted the pipe into the gate valve, the water began to flow out because the discharge point was downstream of the tank car and there was no water backflow preventer installed, which caused the siphon phenomenon, causing the chemicals to be sucked out of the tank car and into the water supply system; The drinking water of a primary school in bowling green, Kentucky, was contaminated with ethylene glycol, a chemical used in an HVAC system, due to the lack of a backflow preventer valve.

When the contractor pumps the drinking water into the geothermal heat pipe, a small amount of ethylene glycol flows back into the drinking water under pressure.

The university then issued a notice to ensure the safety of drinking water in the future, staff in the HVAC system pipes installed double check backflow preventer.

ZhengFeng is striving to offer customers backflow preventer for sale with high qality.

Company Contact:

• Posted By: ZhengFeng Valve Group

• Phone: 13816296699

• Address: Caoan Road 3999#, JiaDing District, Shanghai, China , jiading , shanghai , China

• Email:

• Website: https://www.zhengfengvalve.com

• Business Description: ZhengFeng Valve Group, founded in 1991 with focus on manufacturing Water valves, including control valves, balancing valves,gate valves, butterfly valves, check valves, and air valves.
  
  Valve sizing 1/2” to 88”, rating BS 10bar through BS 25bar, served covering buildings & construction，waterworks ，fire protection and many other fields.
  
  Zhengfeng has excellent product quality and sound managing system.
  
  We have certificates of ISO9001, ISO14001,ISO18001,WRAS， FM，API 6D, CE, TS, and Sanitary Certificate for Drinking Water Equipment.
  
  Meanwhile, our products are insured by PICC.
  
  Besides, we are member of China Valve Industry Association, China Fire-proof Association and Water Supply and Sewage Engineering Division of China Construction Metal Structure Association, and having long-term cooperation with China National Chemical Equipment Corporation (CNCE) and China Petroleum & Chemical Engineering Survey and Design Association（CPCESDA）.
  
  After development of 26 years, today the company supplies products to more than 30 countries and regions in the world and becomes one of the leading suppliers of water valves in China.