Backflow Preventers

ZECO Valve Group, founded in 1991 with focus on manufacturing china water valve, including control valves, balancing valves, gate valve, 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. ZECO has excellent product quality and sound managing system.

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 to mix chlordane and heptachlor in tanker trucks. The end of the hose is immersed in the chemicals, while water 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 2.5 inch 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 10 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 installed double check backflow preventer.

As one of the backflow preventer suppliers and backflow preventer manufacturers, we offer many high quality products and after read this, you can know where to buy backflow preventer.