What is Backflow?
Backflow is the undesirable reversal of flow of non-potable water or other substances through a cross-connection and into the piping of a public water system or consumer's potable water system. There are two types of backflow: back-pressure and back-siphonage
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What Causes Backflow?
There are two types of backflow conditions: back-pressure and
back-siphonage.
Back-pressure occurs when the pressure in the consumer's line is greater than the pressure in the public water system's supply line. Examples, when using well water, gray water, and rainwater pump to irrigate and being dually connected to the public water supply: pumping at a higher pressure creates backflow pressure, possibly pumping into the public supply.
Back-siphonage occurs when the pressure in the public water system drops and backflow occurs, causing water to flow backward in a reverse direction or back-siphonage condition. Backflow devices are designed to prevent and protect our water system from both of these conditions.
What is a Cross-Connection
A cross-connection is any temporary or permanent connection between a public water system or consumer's potable (i.e., drinking) water system and any source or system containing nonpotable water or other substances. An example is the piping between a public water system or consumer's potable water system and an auxiliary water system, cooling system, or irrigation system.
What is a Backflow Preventer?
A backflow preventer is a means or mechanism to prevent backflow. The most effective means of preventing backflow is an air gap, which either eliminates a cross-connection or provides a barrier to backflow. The basic mechanism for preventing backflow is a mechanical backflow preventer, which provides a physical barrier to backflow. The principal types of mechanical backflow preventer are the reduced-pressure principle assembly, the pressure vacuum breaker assembly, and the double check valve assembly. A secondary type of mechanical backflow preventer is the residential dual check valve.
When Do I Need To Have My Device Tested?
All testable devices are required to be tested at least annually, but certain high-hazard applications require testing every six months. Only a trained and certified tester is allowed to perform a backflow test and must use a professionally calibrated test kit. If you need to schedule a test, or are unsure if your device needs testing, give us a call at 678-814-8242 or send us a message any time!
Any Other Questions?
Don't hesitate to contact us any time with any question whether it's about our services, or you just want to know more about backflow prevention and cross-connection control. We'd be happy to answer any questions you might have. You can call us at 678-814-8242 or send us an email at KershnerKMD@Gmail.com.