A backflow preventer shall be provided on all service connections to properties having a supplemental source of water, wells, fire sprinkler system, irrigation system that has an automatic chemical feeding control, pumps or any other instances that has a potential to contamiante potable water supply or as directed by the District.
A backflow preventer shall operate on the reduced pressure principle and shall consist of two spring-loaded check valves and a spring-loaded, diaphragm actuated, differential pressure relief valve located between the two check valves, in accordance with the District's Standard Drawings. The backflow preventer assembly shall meet all applicable requirements of AWWA C511 and shall be included on the most current "list of Approved Backflow Prevention Assemblies" issued by the California Department of Public Health (CDPH).
Assembly shall be:
Wilkins 975XL2TCU or 375XL for 3/4' to 2" and Wilkins 375DA for 2 1/2" or greater.
26375 Fremont Road, Los Altos Hills, CA 94022 24hour (650) 948-1217 Fax (650) 948-0961
OUR WATER: Snowmelt stored in the Hetch Hetchy Reservoir.