HomeMy WebLinkAbout4d. Fire Service_Backflow - Design Requirements
DESIGN REQUIREMENTS
FOR FIRE SERVICE 3-INCH AND LARGER
AND BACKFLOW ASSEMBLY INSTALLATION
Y:\Public Services New\Webpage\PLAN CHECKS\Fire Service_Backflow Design Requirements 2017.doc
Otay Water District, Public Services Division
2554 Sweetwater Springs Blvd
Spring Valley, CA 91978-2004
1. Installation shall be in accordance with the Water Agencies’ Standards (WAS)
2. A pre-construction meeting with the District is required prior to installation
3. Any installation of District facilities without the benefit of District inspection is subject to rejection
and removal
4. Water Loss for fire flow testing purposes must be paid for prior to the acceptance of the project
5. Provide a plan view drawing on 8.5 X 11 sheet showing the following:
Pipe layout including pipe size, type, and class
If steel pipe is used, additional submittals may be required
Location and degree of angle for all bends
Thrust/anchor blocks required for all bends, reducers, etc.
Location and size of all thrust/anchor blocks. Design thrust/anchors per WAS
DESIGN GUIDELINES
SECTION 5.0 WATER PIPELINE DESIGN
5.2 Thrust Restraint and Anchor Blocks
STANDARD SPECIFICATIONS
DIVISION 03 CONCRETE
Section 03000 Cast-in-Place Concrete
Right-of-Way/Property Lines and Assessor Parcel Number (APN)
Location of assembly in relation to RW/PL, sidewalks, driveways, etc
Registered Engineer Stamp
If pipe installation requires changes in vertical alignment, provide a profile view showing the
above bulleted items
A profile view may be required at the District engineer’s discretion
6. Use and call out the following WAS standard drawings
STANDARD DRAWINGS - WATER
BACKFLOW PREVENTION DETAILS
WR-01 19mm through 50mm (3/4” through 2”)
Reduced Pressure Backflow Prevention Device
WR-02 75mm (3") and Larger
Reduced Pressure Backflow Prevention Device
FIRE HYDRANT AND FIRE SERVICE DETAILS
WF-05 100mm (4") and Larger Fire Service Installation (1 of 2)
100mm (4") and Larger Fire Service Installation Notes (2 of 2)
If you have any questions please call Public Services at (619) 670-2241 or e-mail pscounter@otaywater.gov.