CSA B64.10S1-B64.10.1S1 : 2004

Technical Committee on Backflow Preventers and Water Pressure
Reducing Valves
Preface
Foreword
B64.10-01
Manual for the Selection and Installation of Backflow
Prevention Devices
1. Scope
2. Reference Publications, Definitions, Abbreviations, and
   Symbols
   2.1 Reference Publications
   2.2 Definitions
   2.3 Abbreviations
   2.4 Symbols
3. Backflow Prevention Methods and Devices
   3.1 Air Gap
   3.2 Barometric Loop
   3.3 Mechanical Protection Devices
        3.3.1 Available Types
        3.3.2 Vacuum Breaker Backflow Preventers - General
        3.3.3 Vacuum Breaker, Atmospheric Type (AVB)
        3.3.4 Vacuum Breaker, Pressure Type (PVB)
        3.3.5 Vacuum Breaker, Hose Connection Type (HCVB)
        3.3.6 Backflow Preventer, Dual Check Valve Type with
               Atmospheric Port (DCAP)
        3.3.7 Backflow Preventer, Reduced Pressure Principle
               Type (RP and RPF)
        3.3.8 Backflow Preventer, Double Check Valve Type
               (DCVA and DCVAF)
        3.3.9 Backflow Preventer, Dual Check Valve Type (DuC
               and DuCF)
        3.3.10 Vacuum Breaker, Laboratory Faucet Type (LFVB)
        3.3.11 Backflow Preventer, Dual Check Valve Type with
               Intermediate Vent (DuCV)
        3.3.12 Backflow Preventer, Single Check Valve Type for
               Fire Systems (SCVAF)
        3.3.13 Vacuum Breaker, Spill-Resistant Pressure Type
               (SRPVB)
4. Selection of Backflow Prevention Devices
   4.1 General
   4.2 Categories of Hazards
   4.3 Principal Ways of Providing Protection
        4.3.1 General
        4.3.2 Individual Protection
        4.3.3 Zone or Area Protection
        4.3.4 Premises Isolation
   4.4 Selection Guide
   4.5 Backflow from Fire Protection Systems
   4.6 Backflow from Water Fill Stations
   4.7 Backflow from Temporary Water Services
5. Installation of Backflow Prevention Devices
   5.1 General Requirements
   5.2 Sizing
   5.3 Temperature and Pressure Limitations
   5.4 Shut-off (Isolating) Valves and Test Cocks
   5.5 Strainers
   5.6 Location
   5.7 Parallel Service
   5.8 Spillage
   5.9 Thermal Expansion
   5.10 Installation Orientation
   5.11 Protection from Freezing
Appendices
A - How Backflow Can Occur
B - Guide to the Assessment of Hazard
C - Water-Hauling Equipment and Backflow Devices
D - Conversion Tables
E - Model Backflow Prevention Bylaw
B64.10.1-01
Manual for the Maintenance and Field Testing of Backflow
Prevention Devices
1. Scope
2. Reference Publications, Definitions, and Abbreviations
   2.1 Reference Publications
   2.2 Definitions
   2.3 Abbreviations
3. Devices to Be Field Tested/Frequency
   3.1 General
        3.1.1 Devices to Be Field Tested and Inspected
        3.1.2 Frequency of Field Testing
        3.1.3 Field Testing - Reporting
4. Device Testers and School Accreditation
   4.1 Certified/Re-certified Backflow Prevention Device
        Tester
   4.2 School Accreditation
   4.3 Tester Licensing/Registration
5. Maintenance
   5.1 General
   5.2 RP Assemblies
6. Test Gauges/Kits
7. Field Tests Required and Pass/Fail Criteria
   7.1 Pressure Vacuum Breaker
        7.1.1 Tests Required
        7.1.2 Air Inlet Valve
        7.1.3 Check Valve
        7.1.4 Static Line Pressure
   7.2 Reduced Pressure Principle Assembly (RP and RPF)
        7.2.1 Tests Required
        7.2.2 Differential Pressure Relief Valve Opening Point
        7.2.3 Check Valve No. 1
        7.2.4 Pass/Fail Criteria
        7.2.5 Check Valve No. 2
        7.2.6 Static Line Pressure
   7.3 Double Check Valve Assembly (DCVA and DCVAF) and Single
        Check Valve Assembly (SCVAF)
        7.3.1 Tests Required
        7.3.2 Check Valve No. 1
        7.3.3 Check Valve No. 2
        7.3.4 Static Line Pressure
   7.4 Field Test for Vacuum Breaker, Hose Connection Dual
        Check Type - Manual Field Test of Downstream Check Valve
        7.4.1 Test Requirement
        7.4.2 Test Set-up
        7.4.3 Test Procedure
   7.5 Spill-resistant Pressure Type Vacuum Breaker (SRPVB)
        7.5.1 Tests Required
        7.5.2 Air Inlet Valve
        7.5.3 Check Valve
        7.5.4 Static Line Pressure
Appendix A - Field Testing Procedures