There are two main causes of backflow: backsiphonage and backpressure.
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A cross-connection is any physical connection between a potential source of contamination and any drinking water system piping. Examples include lawn irrigation and fire suppression systems.
For more information, please visit Cross-Connection & Backflow Prevention (LINK).
Backflow is the flow through a cross-connection from a potential source of contamination back into the drinking water system.
Any unprotected or inadequately protected cross-connection on your premises could contaminate the potable water supply for your customers, employees and even neighboring homes and businesses. Severe illnesses have resulted from cross-connection contamination events that could have been easily prevented.
You are responsible for all unprotected or inadequately protected cross-connections on your premises and liable for any damages or illnesses they may cause. In cases where business owners have been proven at fault for cross-connection contamination events, judges and juries have awarded plaintiffs substantial monetary damages.
Each cross-connection must be eliminated or properly protected by an approved backflow preventer. All work done on the internal plumbing system of your facility must be performed by a state-licensed plumber. Any changes to your plumbing must be approved by your local plumbing inspector.
Virginia Law 12VAC5-590-610 Owner Requirements:
Spotsylvania County Utilities is responsible for maintaining records on testable backflow prevention devices connected to the public water distribution system, enforcing state laws regarding proper installation/maintenance and sending out annual notices to property owners/responsible parties with testable backflow devices due to re-certification.