If you have a connection to a municipal water source ... Although backflow preventers are more common at commercial buildings that have fire sprinkler systems, residential customers may need ...

A backflow preventer is a special-purpose device used for protection against the undesirable reversal in the flow of water. These devices are primarily used in sewer, wastewater, residential ...

A certified tester takes samples of water near these connections to determine whether there is any foreign debris. The tester also examines backflow prevention devices that ... plumbing services ...