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What is "backflow"? Backflow is the undesirable reversal of the flow of water or mixtures of water and other undesirable substances from any source (such as used water, industrial fluids, gasses, or any substance other than the intended potable water) into the distribution pipes of the potable water system.
What is the backflow testing?
A backflow prevention device is used to protect potable water supplies from contamination or pollution due to backflow. In water supply systems, water is normally maintained at a significant pressure to enable water to flow from the tap, shower, or other fixture.
How does backflow happen?
Backflow is the undesirable reversal of flow of water or mixtures of water and other substances back into the public drinking water system. This is usually caused by backpressure, which occurs when downstream pressure rises above the supply pressure.
What are the main causes of backflow?
Backflow is caused by cross-connections that have the potential of allowing contaminants into the drinking water system. Back siphonage can occur when the pressure in a tank or water trough is lower than the water system's pressure. ... Another cause of backflow is back pressure
What is a backflow preventer sprinkler system?
Irrigation system backflow prevention devices are used to protect water supplies from contamination or pollution. Irrigation backflow devices are designed for installation on potable water lines to protect against both back-siphonage and back-pressure of contaminated water into the potable water supply.
https://www.youtube.com/watch?v=YyUi4RMb-bA Backflow Permit