Who is required to have a backflow prevention assembly?
Federal and State law require that water suppliers protect their water systems from contamination. State regulations exempt single family residences used solely for residential purposes from assembly requirements if there are no hazards present. However, residences used for other purposes, as well as commercial and industrial customers, are required by City Ordinance #7-03-001-0016 and State Administrative Code rule R18-4-115 to install and maintain backflow prevention assemblies. (Copies of Ordinance #7-03-001-0016 are available in the Flagstaff City Clerk’s office.) When a determination is made by the Flagstaff Industrial Waste Monitoring Division that the potable water system may be subject to contamination through backflow, a backflow prevention assembly will be required. Flagstaff Industrial Waste Monitoring Division makes these decisions on a case by case basis.
