1. (a) No farther than 1,320 linear feet apart on all mains having a diameter of 12 inches or less.
2. (b) At each tee or crossing connection between mains that have a diameter of 12 inches or less, within 100 feet of the tee or crossing connection with the primary main.
3. (c) Between the water main and each fire hydrant served by the main.

As a minimum, isolation valves shall be installed on all new water mains within the distribution system as follows:

Note: Authority cited: Sections 116350, 116375 and 131200, Health and Safety Code. Reference: Sections 116275, 116375, 116535 and 131051, Health and Safety Code.

History

1. New section filed 2-8-2008; operative 3-9-2008 (Register 2008, No. 6).