All properties as described above must comply with state regulations for the installation and annual testing of backflow prevention assemblies.
View information on installation criteria and/or which backflow prevention assemblies are required to be installed and tested annually. City staff may need to survey properties to determine whether cross-connections are present, what the degree of hazard is or if approved assemblies are installed in proper locations.
The city’s Backflow Prevention Program tracks the installation and annual testing of "containment" assemblies. Containment assemblies must be installed after the meter but prior to any plumbing branches. It is possible that two containment assemblies may be required.
Other assemblies may be required inside a property by plumbing code. These are called "isolation" assemblies because they isolate internal hazards. In most cases the city does not track these assemblies. It is strongly recommended that isolation assemblies are tested annually along with containment assemblies as they can keep water inside the property safe for consumption.