Backflow is the undesirable reversal of flow of nonpotable 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... backpressure backflow and backsiphonage.
What is a backflow preventer?
A backflow preventer is a means or mechanism to prevent backflow. The basic 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.
What happens if my backflow prevention device does not pass the test?
The trained professionals from 123 Backflow Testing have the “know-how” to service your backflow prevention device - on site and right away. Some larger, more complex tasks may require time, but in most cases they are in and out of there.
Does my water get interrupted during one of these tests?
Yes, but only momentarily - about 5-10 minutes.
How often do I have to test my backflow prevention device?
There are three instances where a backflow prevention device needs to be tested: - upon initial installation - annually - after the device has been serviced for any reason
Why is it that my backflow preventer has to be tested so often?
Mechanical backflow preventers have internal seals, springs, and moving parts that are subject to fouling, wear, or fatigue. Also, mechanical backflow preventers and air gaps can be bypassed. Therefore, all backflow preventers have to be tested periodically to ensure that they are functioning properly. A visual check of air gaps is sufficient, but mechanical backflow preventers have to be tested with properly calibrated gauge equipment
Why do water suppliers need to control cross-connections and protect their public water systems against backflow?
Backflow into a public water system can pollute or contaminate the water in that system (i.e., backflow into a public water system can make the water in that system unusable or unsafe to drink), and each water supplier has a responsibility to provide water that is usable and safe to drink under all foreseeable circumstances. Furthermore, consumers generally have absolute faith that water delivered to them through a public water system is always safe to drink. For these reasons, each water supplier must take reasonable precautions to protect its public water system against backflow.
How long does the test take?
Each test varies, but in most circumstances, tests take no more than 10 minutes.
What is a backflow prevention device?
Backflow prevention devices prevent contaminated water or chemicals from flowing back into the public drinking water supply system. Certain types of businesses are legally mandated to install and operate approved backflow preventers. For a comprehensive list of approved devices, please see below.
Why are backflow prevention devices required?
Backflow prevention devices are an important component of the New York City Department of Environmental Protection’s drinking water protection program and are legally mandated under the New York State Sanitary Code and the Rules of the City of New York for those businesses identified as posing a risk to the public water supply.
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