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§ 64575. Flushing.

22 CA ADC § 64575Barclays Official California Code of Regulations

Barclays California Code of Regulations
Title 22. Social Security
Division 4. Environmental Health
Chapter 16. California Waterworks Standards
Article 4. Materials and Installation of Water Mains and Appurtenances
22 CCR § 64575
§ 64575. Flushing.
Currentness
(a) A flushing valve or blowoff shall be provided at the end of each newly installed dead-end water main. Fire hydrants meeting the criteria of this section may be considered flushing valves.
(b) Flushing valves and blowoffs shall not discharge to a sanitary sewer without an air gap separation between the sewer and the valve or blowoff.
(c) The flushing velocity in the main shall not be less than 2.5 ft/s unless it is determined that conditions do not permit the required flow to be discharged to waste.
(d) Newly installed flushing valves and blowoffs shall be designed to maintain the minimum continuous flushing flows as indicated below to produce a minimum velocity of 2.5ft/s in commonly used sizes of pipe.
Table 64575-A. Minimum Flushing Flows for Different Size Water Mains.
Nominal Main Size Diameter (inches)
Minimum Flushing Flow (gallons per minute)
2
25
3
50
4
100
6
225
8
400
10
600
12
900
14
1200
16
1600

Credits

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).
2. Change without regulatory effect amending subsection (a) filed 4-21-2011 pursuant to section 100, title 1, California Code of Regulations (Register 2011, No. 16).
This database is current through 5/10/24 Register 2024, No. 19.
Cal. Admin. Code tit. 22, § 64575, 22 CA ADC § 64575
End of Document