What is a backflow prevention device?
The backflow device prevents mixing of drinking and treated water from flowing into the public water system by maintaining a constant higher pressure in its pipes. Many types of backflow prevention devices also have test ports so that they can be tested or examined to ensure that they are functioning properly. A check valve is a common form of a backflow preventer.
Backflow prevention protects the potable water system from minor, moderate, and severe hazards. There are over 10,000 reported cases of backflow contamination each year.
Backflow devices, are about the size of a suitcase, and are typically installed in front yards near the water meter. Many homeowners, especially in older communities, are likely to object when they find out installation means tearing up their landscaping. Many states and/or local municipalities actually require annual testing of such devices.
An outdoor 18-inch-tall brass gadget, which prevent the accidental contamination of the public drinking-water supply, costs about $500 to install by a private contractor and could require to licensed plumber to test every year at about $60.
