Lawn Irrigation and Cross Connection Control (Backflow Prevention)

Image of a lawn sprinkler systemExample of a backflow preventerFederal, state, and local regulations require every municipal water supplier to develop, implement, and maintain a comprehensive Cross Connection Control program designed to safeguard the public water supply.

Cross connections are sometimes protected by a valve called a backflow preventer. Backflow preventers are the property of the water customer and the responsibility lies with the customer for required annual testing and maintenance. The water customer must contract with a certified tester to perform the required annual tests and any necessary repairs. Most plumbing contractors and irrigation firms are certified to test backflow preventers.

Please realize that there are costs associated with testing and maintaining backflow preventers.

Backflow preventers may be found at any number of locations on your water systems. Typically, commercial and industrial customers will have backflow preventers just after the water meter and also on wet fire protection systems. Lawn irrigation systems or other water connections throughout their facilities may also have or require backflow protection.

Residential backflow preventers may be found on lawn irrigation systems, wet fire protection systems, hot water heating (boiler) systems, swimming pool fills, water features, etc.  Backflow preventers may also be found or required if there is another water source on the site such as a well, pond, river, etc. 

It is common for lawn sprinkler systems to start up in the spring. Codes require backflow preventer testing annually, and especially after installation, re-installation, relocation, and/or repairs.

Aqua Backflow (link to company's website) assists the City of Warrenville Utility Division staff with administering the backflow program. If a Warrenville customer has or requires backflow protection, Aqua Backflow may notify them for compliance (testing, repairs, installations, inspections, or surveys). 

Remember that Cross Connection Control programs are designed to safeguard public health.  Cooperation with the program, its enforcement, and any requests for information that come from Aqua Backflow or the City's Utility Division staff is appreciated.  Aqua Backflow does not test, install, or repair backflow preventers.

  • Direct questions to: Aqua Backflow can be reached at 847-742-2296.