Backflow is when there is an overwhelmingly poor reversal of flow in the drinking water system for your home.
This can lead to contamination of the water supply through backpressure or backsiphonage. As a homeowner, the last thing you want to deal with is unsafe drinking water.
Backflow prevention devices keep your water clean and potable by keeping pollutants from contaminating your water supply via backflows, which is when waste water runs in the opposite direction. When that happens, you can be exposed to contaminants that can make you severely ill. Drinking water can also be contaminated by backflow from the following places: fire sprinkler systems, commercial boiler systems, underground lawn irrigation, and boiler systems with anti-freeze.