What should I know about the backflow prevention?
systems that distribute the reserves of urban water are designed with the intention that the flow of water flows only in one direction. However, abnormal conditions may occur in water systems that cause water flow in the opposite direction. This condition is called back flow and can result in contamination of water supply in unprotected systems. Prevention of back flow is necessary to maintain water for water without contaminants and there are many ways to implement it.
Return prevention protects the drinking water system from many types of risks. There are thousands of reported reverse flow cases each year and some may be fatal. All plumbing codes require installation of back flow devices if necessary and testing them annually. The simplest and most effective technique of backflow prevention is the air gap. The air gap is simply the air space between any device that opens to plumbing like a faucet, and any place where water withBiří.
One example of the air gap is the space between the edge of the sink and the output of the faucet. Even with a sink full of water, there is no way that the water could pull back into the faucet if the pressure was lost. This pressure loss is the most common type of backflow and is called Backsiphonage. Backsiphonage often occurs when there is a sudden drop in public water pressure, which supplies water to the house. This can happen if the main water breaks or if the fire hydrant is turned on.
To show the value of the air gap in this situation, imagine whether it has been removed by connecting the hose to the washbasin and by lowering the hose to the sink. If the water pressure reverses, the water in the sink would be siphoned back with a hose and faucet and into the home water supply. If the sink in this example is offended by the toilet tank or garden hose, the end of which is in the puddle of groundwater, isVery obvious importance of backflow prevention.
Air gaps are not the only form of backflow prevention. There are simple devices that can be installed on outdoor faucets, such as Bibb Hose vacuum cleaners to prevent back flow in these places. It is also advisable to install an anti-siffon set in the toilet tank to prevent backflow. These tanks are a common danger of back flow and serious, because the water in the toilet tanks is often treated with cleaning chemicals that are dangerous if they are ingested.