Cross Connection / Backflow
Protect your drinking water from cross-contamination
Drinking water systems may become polluted or contaminated through uncontrolled cross connections. Water normally flows in one direction, from the public water system through the customer’s plumbing to a sink tap or other plumbing fixture. Under certain conditions water can flow in the reverse direction.
This backsiphonage may occur due to a loss of pressure in the water distribution system during a high withdrawal of water for fire protection, a water main or plumbing system break, or a shutdown of a water main or plumbing system for repair.
Most plumbing fixtures have a built-in backflow protection such as a physical air gap. Others, such as irrigation systems and fire suppression systems, require a mechanical backflow prevention device. The pressure vacuum breaker or reduced pressure assembly are two examples of the most common backflow prevention assemblies used in homes. While these systems, along with the water line coming into your home should have a backflow prevention device, care should be taken to ensure cross-contamination does not take place.
How to prevent contamination of your drinking water
Cross Connection / Backflow C
Annual registration is required to be certified as a backflow assembly tester in the Town of Castle Rock. You must complete the registration form and submit a copy of the current tester certification and gauge calibration(s).
Certification / education classes will be held anytime there are updates to the Town’s Municipal Code regarding cross connections / backflow or the Town’s Cross Connection Manual. If you have any questions, email us.
A current list of certified backflow prevention testers can be viewed online.