Backflow Preventers
The problem of contaminated water due to backflow is emerging, and the health hazards caused by contaminated water are also alarming to engineers and water equipment suppliers. The problem of backflow water may occur in every place where water is used. We can learn about the harm caused by backflow water from the following two specific cases: A serious backflow problem occurred in Allegheny County, Pittsburgh, Pennsylvania.
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 thegate 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.
Our company has backflow preventer for sale!
ZECOis one of the most professionalchina check valve manufacturers, and we have been devoted to produce china control valvefor many years. If you want to know more details or want a quotation, just feel free to contact us!
Send product request
Other supplier products
 |
Wafer Concentric Butterfly Valve with Post Indicator 1025 | Basic information of Wafer Concentric Butterfly Valve with Post IndicatorThis valve can be used to open or close the medium in the fluid pipe and i... |
 |
Gate Valve | The resilient seatedgate valveof ZhengFeng is widely used and reliable in the water supply and drainage system of water supply company, sewage comp... |
 |
Forged Steel Gate Valve | Categories: Forged Steel Gate Valve, Gate Valve Tag: OS&Y Valve Description ZECO manufacturing capabilities for API 602 Forged Gate valves... |
 |
Clean Water Air Release Valve | Basic informationThis is installed at the highest point of the pipe or where there is a closed air, which is used to discharge the gas in the pipe ... |
 |
Backflow Preventers | Festures of Backflow Preventers The double check valve is designed as a whole, with small structure； Body is streamlined with little resistance l... |
Same products
 |
Class 300 Valve | Seller: GangYe Group Co.,Ltd. | Class 300 valves have a pressure rating of 300 pounds per square inch (psi) or 20.7 bar, allowing... |
 |
Class 3000 Industrial Valve | Seller: GangYe Group Co.,Ltd. | Wafer Body, Full Port Design, Flanged End Class 3000 Ball Valve. A ball valve class 3000pressure-... |
 |
Class 2500 Industrial Valve | Seller: GangYe Group Co.,Ltd. | Class 2500 valves can be used for both on-off and throttling applications. The specific valve typ... |
 |
Class 150 Valve | Seller: GangYe Group Co.,Ltd. | globe valve class 150is a pressure rating designation defined by standards organizations, such as... |
 |
Class 1500 Industrial Valve | Seller: GangYe Group Co.,Ltd. | A class 1500 valve made of 316 stainless steel, for instance, can sustain 248 bar of pressure at ... |
