A cross-connection is a connection between the public system and a source of non-potable (not safe to drink or contaminated) water or other fluid. If such a connection is not properly controlled, and a backflow occurs, contaminants could make their way from a non-potable source into the public system. Because of the risk of contamination, such non-potable systems typically require the installation and proper maintenance of a backflow prevention assembly.
Examples of common cross connections are:
- Commercial kitchen equipment
- Commercial laundry equipment
- Fire suppression systems
- Lawn sprinkler systems
- Outdoor pools