Chapter 12.14 CONTROL OF BACKFLOW AND CROSS-CONNECTIONS


Section 12.14.110 Approval standards.

    1. Any backflow prevention device required herein shall be of a model and size approved by the manager. The term "approved backflow prevention device" shall mean a device that has been manufactured in full conformance with the standards established by the American Water Works Associations (AWWA) entitled: ANSI/AWWA C510-97 Standard for Double Check Valve Backflow Prevention Assembly and ANSI/AWWA C511-97 Standard for Reduced-Pressure Principle Backflow Prevention Assembly   and by the American Society of Sanitary Engineers (ASSE) entitled:

ASSE Standard # 1001- 2002
Performance Requirements for Atmospheric Type Vacuum Breakers

ASSE Standard #1002-1999
Performance Requirements for Anti-Siphon Fill Valves (Ballcocks) for Gravity Water Closet Flush Tanks

ASSE Standard #1011-2004
Performance Requirements for Hose Connection Vacuum Breakers

ASSE Standard #1012-2002
Performance Requirements for Backflow Preventer with Intermediate Atmospheric Vent

ASSE Standard #1013-2005
Performance Requirements for Reduced Pressure Principle Backflow Preventers and Reduced Pressure Fire Protection Principle Backflow Preventers

ASSE Standard #1015-2005
Performance Requirements for Double Check Backflow Prevention Assemblies and Double Check Fire Protection Backflow Prevention Assemblies

ASSE Standard #1019-2004
Performance Requirements for Vacuum Breaker Wall Hydrants, Freeze Resistant, Automatic Draining Type

ASSE Standard #1020-2004
Performance Requirements for Pressure Vacuum Breaker Assembly

ASSE Standard #1021-2001
Performance Requirements for Drain Air Gaps for Domestic Dishwasher Applications

ASSE Standard #1022-2003
Performance Requirements for Backflow Preventer for Beverage Dispensing Equipment

ASSE Standard #1024-2004
Performance Requirements for Dual Check Backflow Preventers

ASSE Standard #1032-2004
Performance Requirements for Dual Check Valve Type Backflow Preventers For Carbonated Beverage Dispensers - Post Mix Type

ASSE Standard #1035-2002
Performance Requirements for Laboratory Faucet Backflow Preventers

ASSE Standard #1047-2005
Performance Requirements for Reduced Pressure Detector Fire Protection Backflow Prevention Assemblies

ASSE Standard #1048-2005
Performance Requirements for Double Check Detector Fire Protection Backflow Prevention Assemblies

ASSE Standard #1052-2004
Performance Requirements for Hose Connection Backflow Preventers

ASSE Standard #1053-2004
Performance Requirements for Dual Check Backflow Preventer Wall Hydrants - Freeze
Resistant Type

ASSE Standard #1055-1997
Performance Requirements for Chemical Dispensing Systems

ASSE Standard #1056-2001
Performance Requirements for Spill Resistant Vacuum Breaker

ASSE Standard #1057-2001
Performance Requirements for Freeze Resistant Sanitary Yard Hydrant with Backflow Protection

ASSE Standard #1060-2006
Performance Requirements for Outdoor Enclosures for Fluid Conveying Components

ASSE Standard #1064-2006
Performance Requirements for Backflow Prevention Assembly Field Test Kits
SERIES 5000-2004

Professional Qualifications Standard for Backflow Prevention Assemblies Testers, Repairers and Surveyors

Said standards and specifications have been adopted by the manager.  Final approval shall be evidenced by a "certificate of approval" issued by an approved testing laboratory certifying full compliance with said standard and specifications.

    2. The manager shall keep a current list of all certified suppliers and their appropriate list of makes and models of backflow prevention devices which the manager has deemed approved.
    3. The manager may require a strainer of approved type and size to be installed in conjunction with required backflow prevention devices.  The installation of strainers shall preclude the fouling of backflow device(s) due to foreseen and unforeseen circumstances occurring to the water supply system such as water main repairs, water main breaks, fires, periodic cleaning and flushing of mains.  These occurrences may cause debris such as scale deposits and sand to flush through the mains causing fouling of backflow device(s).  (Ord. 2006-0369; 93/U-954)