Approved Backflow Prevention Devices List
Those seeking to acquire the list of approved backflow prevention devices should call the Drinking Water Program at (916) 449-5600 and request a copy of the list [or the portion needed -- the list is by size of device, so if you’re only looking for a 4-inch reduced pressure (RP) backflow prevention device, for example, only a page or two may be needed].
University of Southern California List of Approved Backflow Devices
(In order to view the approved list, a membership is required and explained on the USC's web site)
The Planning Division offers Second Opinion Services should you feel you need further clarification or additional confirmation regarding your zoning matter.
City of Huntington Beach
Public Works Department
2000 Main Street
Huntington Beach, CA
Phone: (714) 536-5431
Fax: (714) 374-1573