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!
在线联系供应商
Other supplier products
 |
Backflow Preventers | The double plateChina wafer check valveis used for the pure pipeline, industry, environmental protection, water treatment, high-rise building water... |
 |
Big Size Resilient Gate Valve | ZECO is one of the leading check valve manufacturers china, China. ZECO check valveprovides non-slam closure, have a low head loss and close drip-t... |
 |
Gate Valve | Gate Valve ZECO is one of the professional gate valve manufacturing companies, specializing in the production of wedge gate valve and through cond... |
 |
Foot Valve | Basic information This valve is installed at the bottom of the pump's underwater pipette, restricting the return of the liquid to the water so... |
 |
Butterfly Valve | ZECO Valve Group, founded in 1991 with focus on manufacturing china water valve, including control valves, balancing valves, gate valve, butterfly ... |
Same products
 |
RV-01A Pressure Relief Valve/Hydraulic Valve | 卖方: Greentech International (Zhangqiu) Co., Ltd | Application:1.Usedinringblowerandsuitablebothpressure/vacuumuse.2.Staticpressuresettingeasilyadju... |
 |
right valves | 卖方: Yuanda Valve Group Co.,Ltd. | right valves Selecting the is essential for the efficiency, safety, and reliability of intel... |
 |
Water Valve | 卖方: Yuanda Valve Group Co.,Ltd. | Water Valve are critical components in plumbing systems, industrial pipelines, and water d... |
 |
Water Valve | 卖方: Yuanda Valve Group Co.,Ltd. | Water Valve are critical components in plumbing systems, industrial pipelines, and water d... |
 |
Water Valve | 卖方: Yuanda Valve Group Co.,Ltd. | Water Valve are critical components in plumbing systems, industrial pipelines, and water d... |
