Draft Details
- Selection and installation of backflow prevent...
- Draft Standard
- Legal Notice for Draft Standards
- Preface
- B64.10 :YY
- + 1 Scope
- 1.1 Application
- + 1.2 Exclusions
- 1.2.1 Product exclusions
- 1.2.2 Other exclusions
- 1.3 Terminology
- 1.4 Units of record
- 2 Reference publications
- + 3 Definitions, abbreviations, and symbols
- 3.1 Definitions
- 3.2 Abbreviations
- + 3.3 Symbols
- 3.3.1 Backflow preventers
- 3.3.2 Vacuum breakers
- 3.3.3 Other symbols
- + 4 Backflow prevention methods and devices
- + 4.1 Air gap
- 4.1.1 General
- 4.1.2 Hazardous installations
- 4.1.3 Use
- + 4.2 Barometric loop
- 4.2.1 General
- 4.2.2 Use
- 4.2.3 Limitations
- + 4.3 Mechanical backflow preventers
- + 4.3.1 Available types
- 4.3.1.1 General
- 4.3.1.2 Plumbing supply fittings
- 4.3.2 Vacuum breaker backflow preventers — Gene...
- + 4.3.3 AVB devices
- 4.3.3.1 General
- 4.3.3.2 Use
- + 4.3.3.3 Limitations
- 4.3.3.3.1 General
- 4.3.3.3.2 Extended periods of flow
- 4.3.3.4 Critical level
- + 4.3.4 PVB devices
- 4.3.4.1 General
- 4.3.4.2 Use
- 4.3.4.3 Critical level
- + 4.3.5 SRPVB devices
- 4.3.5.1 General
- 4.3.5.2 Use
- 4.3.5.3 Critical level
- + 4.3.6 HCVB and HCDVB devices
- 4.3.6.1 General
- 4.3.6.2 HCVB devices
- 4.3.6.3 HCDVB devices
- + 4.3.7 DCAP and DCAPC backflow preventers
- + 4.3.7.1 DCAP backflow preventers
- 4.3.7.1.1 General
- 4.3.7.1.2 Use
- 4.3.7.1.3 Limitation
- 4.3.7.2 DCAPC backflow preventers
- + 4.3.8 RP backflow preventer
- 4.3.8.1 General
- 4.3.8.2 Use
- + 4.3.9 DCVA backflow preventers
- 4.3.9.1 General
- 4.3.9.2 Use
- + 4.3.10 DuC and DuCF backflow preventers
- 4.3.10.1 General
- 4.3.10.2 Use
- 4.3.10.3 DuCF backflow preventers
- + 4.3.11 LFVB devices
- 4.3.11.1 General
- 4.3.11.2 Use
- + 4.3.12 DuCV backflow preventers
- 4.3.12.1 General
- 4.3.12.2 Use
- + 4.3.13 SCVAF backflow preventers
- 4.3.13.1 General
- 4.3.13.2 Use
- + 4.3.14 Backflow preventer, air space type (ASVB...
- 4.3.14.1 General
- 4.3.14.2 Use
- + 5 Selection of backflow preventers
- + 5.1 General
- 5.1.1 Method of protection
- 5.1.2 Buildings
- + 5.1.3 Connections
- + 5.1.3.1 Potable water and lead content
- 5.1.3.1.1 Connections to potable water systems
- 5.1.3.1.2 Lead content
- 5.1.3.2 Connection categories
- 5.1.4 Evaluation criteria
- 5.1.5 Selection criteria
- 5.2 Categories of hazards
- + 5.3 Principal ways of providing protection
- + 5.3.1 General
- 5.3.1.1 Selection process
- 5.3.1.2 Premise isolation
- 5.3.1.3 Premise isolation for other water servi...
- 5.3.1.4 Additional protection
- + 5.3.2 Individual protection
- 5.3.2.1 Back siphonage protection
- 5.3.2.2 Back pressure type backflow protection
- 5.3.2.3 Air gaps
- 5.3.3 Area protection
- + 5.3.4 Zone protection
- 5.3.4.1 General
- 5.3.4.2 Emergency eyewash and emergency shower
- + 5.3.5 Premises isolation
- 5.3.5.1 General
- 5.3.5.2 Levels of protection
- 5.3.5.3 Buildings or facilities isolated by a D...
- + 5.4 Selection guide
- 5.4.1 Type of backflow preventer
- 5.4.2 Buildings classified as moderate hazards
- Note: For guidance, see Annex B.5.4.3 Single t...
- 5.4.4 Individual protection
- + 5.5 Backflow from fire protection systems
- 5.5.1 General
- 5.5.2 Potable water connections to fire protect...
- 5.5.3 Installation
- + 5.6 Backflow from water fill stations
- 5.6.1 General
- 5.6.2 Water fill station piping
- 5.7 Backflow from temporary water services
- + 5.8 Backflow from irrigation systems
- 5.8.1 Above-ground irrigation systems
- 5.8.2 In-ground irrigation systems
- + 5.9 Backflow from hydronic heating systems
- 5.9.1 Hydronic heating systems
- 5.9.2 Other heating systems
- + 5.10 Heat exchangers
- 5.10.1 General
- 5.10.2 Potable water or relatively harmless flu...
- 5.10.3 Other heat-transfer fluids
- 5.10.4 Potable make-up water
- 5.10.5 Make-up water connections
- 5.10.6 All other heat exchangers
- 5.11 Backflow from chemical dispensing systems
- + 6 Installation requirements
- + 6.1 General requirements
- 6.1.1 Accessibility
- 6.1.2 Clearances
- 6.1.3 Support and restraint
- 6.1.4 Bypasses
- 6.1.5 Field testing at installation
- 6.1.6 Installation of DCAPC backflow preventers...
- 6.1.7 Flushing
- 6.1.8 Installation of a vacuum breaker, air spa...
- 6.2 Sizing
- 6.3 Working pressures and temperatures
- + 6.4 Shut-off valves and test cocks
- 6.4.1 General
- 6.4.2 Seats
- 6.4.3 Test cocks
- 6.5 Strainers
- + 6.6 Location
- 6.6.1 Air gaps, backflow preventers, or vacuum ...
- 6.6.2 RPs
- 6.6.3 DCVAs
- 6.6.4 DCVAs installed in a below-grade pit or v...
- 6.6.5 Other system safety devices
- 6.6.6 PVBs
- 6.7 Parallel service
- + 6.8 Connections to drains
- 6.8.1 Relief ports
- 6.8.2 Connection to the relief port
- 6.9 Thermal expansion
- 6.10 Installation orientation
- + 6.11 Protection from freezing
- 6.11.1 General
- 6.11.2 Insulation or any other protection
- 6.11.3 Insulation applied directly to a backflo...
- + 6.12 Enclosures
- 6.12.1 Insulated enclosures
- 6.12.2 Confined space enclosure
- 7 Cross-connection control surveyor
- + Annex A (informative)
- + A.1 Back siphonage
- A.1.1 Conditions
- A.1.2 Reasons for water pressure to fall below ...
- A.1.3 Pressure drop
- A.1.4 Accidental break
- + A.2 Back pressure backflow
- A.2.1 General
- + A.2.2 Back pressure as a result of pressure var...
- A.2.2.1 General
- A.2.2.2 Secondary or alternative water systems
- A.2.2.3 Direct connection to a boiler
- + Annex B (informative)
- B.1 General
- B.2 Guide to degree of hazard
- + Annex C (informative)
- C.1 General
- Annex D (informative)
- + Annex E (informative)
- E.1 General
- + Annex F (informative)
- + F.1 Contamination of potable water
- F.1.1 General
- F.1.2 Components
- + F.2 Heat-transfer fluid
- F.2.1 Pressure
- F.2.2 Maintaining the pressure
- F.3 Heat exchangers
- + F.4 Markings
- F.4.1 General
- F.4.2 Piping
- F.4.3 Heat exchangers
- F.4.4 Systems
- F.4.5 Potable water systems using a single wall...
- + Annex G (informative)
- G.1 Hodge and Sterner scale
- G.2 LD50
- B64.10.1 :YY
- + 1 Scope
- 1.1 General
- 1.2 Exclusions
- 1.3 Terminology
- 1.4 Units of record
- 2 Reference publications
- 3 Definitions, abbreviations, and symbols
- + 4 Devices to be field tested, frequency, and re...
- + 4.1 Devices to be field tested
- 4.1.1 General
- 4.1.2 Inspection
- 4.2 Frequency of field testing
- + 4.3 Reporting
- 4.3.1 Forms
- 4.3.2 Fire protection notification
- 5 Backflow prevention device testers
- + 6 Maintenance
- + 6.1 General
- 6.1.1 Water line used as the electrical ground
- 6.1.2 Confined spaces
- 6.1.3 In-line servicing and repair
- 6.1.4 Valve springs
- 6.1.5 Entrapped air
- + 6.2 RP backflow preventers
- 6.2.1 General
- 6.2.2 Relief port leaks
- 6.2.3 Discharge from relief port
- + 6.3 DCAPC backflow preventers
- 6.3.1 General
- 6.3.2 Water and carbon dioxide (CO2) leaks
- + 7 Test gauges and kits
- 7.1 Accuracy
- 7.2 Verification and calibration
- 7.3 Units
- + 8 Field test requirements and pass/fail criteri...
- + 8.1 PVB devices
- 8.1.1 General
- + 8.1.2 Air inlet valve
- 8.1.2.1 Requirements
- 8.1.2.2 Pass/fail criteria
- + 8.1.3 Check valve
- 8.1.3.1 Requirements
- 8.1.3.2 Pass/fail criteria
- + 8.1.4 Static line pressure
- 8.1.4.1 Requirements
- 8.1.4.2 Pass/fail criteria
- + 8.2 RP backflow preventers
- 8.2.1 General
- + 8.2.2 Relief valve
- 8.2.2.1 Requirements
- 8.2.2.2 Pass/fail criteria
- + 8.2.3 Check valve 1
- + 8.2.3.1 Requirements
- 8.2.3.1.1 Duration
- 8.2.3.1.2 Differential pressure
- + 8.2.3.2 Pass/fail criteria
- 8.2.3.2.1 General
- 8.2.3.2.2 Additional criteria
- + 8.2.4 Check valve 2
- 8.2.4.1 Requirements
- 8.2.4.2 Pass/fail criteria
- + 8.2.5 Static line pressure
- 8.2.5.1 Requirements
- 8.2.5.2 Pass/fail criteria
- + 8.3 DCVA, and SCVAF backflow preventers
- 8.3.1 General
- + 8.3.2 Check valve 1
- 8.3.2.1 Requirements
- 8.3.2.2 Pass/fail criteria
- + 8.3.3 Check valve 2
- 8.3.3.1 Requirements
- 8.3.3.2 Pass/fail criteria
- + 8.3.4 Static line pressure
- 8.3.4.1 Requirements
- 8.3.4.2 Pass/fail criteria
- + 8.4 HCDVB devices — Manual field test of downst...
- 8.4.1 Test requirement
- 8.4.2 Test set-up
- 8.4.3 Test procedure
- + 8.5 SRPVB devices
- 8.5.1 General
- + 8.5.2 Air inlet valve
- 8.5.2.1 Requirements
- 8.5.2.2 Pass/fail criteria
- + 8.5.3 Check valve
- 8.5.3.1 Requirements
- 8.5.3.2 Pass/fail criteria
- + 8.5.4 Static line pressure
- 8.5.4.1 Requirements
- 8.5.4.2 Pass/fail criteria
- + Annex A (informative)
- + A.1 PVB devices — Field testing using a differe...
- + A.1.1 PVB devices — Testing procedures using a ...
- A.1.1.1 Equipment required
- + A.1.1.2 PVB devices — Test No. 1: Air inlet val...
- A.1.1.2.1 Purpose
- A.1.1.2.2 Requirements
- A.1.1.2.3 Procedure
- A.1.1.2.4 Leaking shut-off valves
- + A.1.1.3 PVB devices — Test No. 2: Check valve t...
- A.1.1.3.1 Purpose
- A.1.1.3.2 Requirements
- A.1.1.3.3 Procedure
- A.1.1.3.4 Leaking shut-off valves
- + A.1.1.4 PVB devices — Test No. 3: Static line p...
- A.1.1.4.1 Purpose
- A.1.1.4.2 Requirements
- A.1.1.4.3 Procedure
- A.1.1.5 Returning PVB devices to service
- + A.1.2 PVB devices — Testing procedures using a ...
- A.1.2.1 Equipment required
- + A.1.2.2 PVB devices — Test No. 1: Air inlet val...
- A.1.2.2.1 Purpose
- A.1.2.2.2 Requirements
- A.1.2.2.3 Procedure
- A.1.2.2.4 Leaking shut-off valves
- + A.1.2.3 PVB devices — Test No. 2: Check valve t...
- A.1.2.3.1 Purpose
- A.1.2.3.2 Requirements
- A.1.2.3.3 Procedure
- A.1.2.3.4 Leaking shut-off valves
- + A.1.2.4 PVB devices — Test No. 3: Static line p...
- A.1.2.4.1 Purpose
- A.1.2.4.2 Requirements
- A.1.2.4.3 Procedure
- A.1.2.5 Returning PVB devices to service
- + A.2 PVB devices — Field testing using the sight...
- A.2.1 Equipment required
- + A.2.2 PVB devices — Test No. 1: Air inlet valve...
- A.2.2.1 Purpose
- A.2.2.2 Requirements
- A.2.2.3 Procedure
- A.2.2.4 Leaking shut-off valves
- + A.2.3 PVB devices — Test No. 2: Check valve tes...
- A.2.3.1 Purpose
- A.2.3.2 Requirements
- A.2.3.3 Procedure
- A.2.3.4 Leaking shut-off valves
- + A.2.4 PVB devices — Test No. 3: Static line pre...
- A.2.4.1 Purpose
- A.2.4.2 Requirements
- A.2.4.3 Procedure
- A.2.5 Returning PVB devices to service
- + A.3 RP backflow preventers — Field testing usin...
- + A.3.1 RP backflow preventers — Testing procedur...
- A.3.1.1 Equipment required
- + A.3.1.2 RP backflow preventers — Test No. 1: Re...
- A.3.1.2.1 Purpose
- A.3.1.2.2 Requirements
- A.3.1.2.3 Procedure
- A.3.1.2.4 Leaking shut-off valves
- + A.3.1.3 RP backflow preventers — Test No. 2: Ch...
- A.3.1.3.1 Purpose
- A.3.1.3.2 Requirements
- A.3.1.3.3 Procedure
- + A.3.1.4 RP backflow preventers — Test No. 3: Ch...
- A.3.1.4.1 Purpose
- A.3.1.4.2 Requirements
- A.3.1.4.3 Procedure
- + A.3.1.5 RP backflow preventers — Test No. 4: Pr...
- A.3.1.5.1 Purpose
- A.3.1.5.2 Requirements
- A.3.1.5.3 Procedure
- + A.3.1.6 RP backflow preventers — Test No. 5: St...
- A.3.1.6.1 Purpose
- A.3.1.6.2 Requirements
- A.3.1.6.3 Procedure
- A.3.1.7 Returning RP backflow preventers to ser...
- + A.3.2 RP backflow preventers — Testing procedur...
- A.3.2.1 Equipment required
- + A.3.2.2 RP backflow preventers — Test No. 1: Re...
- A.3.2.2.1 Purpose
- A.3.2.2.2 Requirements
- A.3.2.2.3 Procedure
- A.3.2.2.4 Leaking shut-off valves
- + A.3.2.3 RP backflow preventers — Test No. 2: Ch...
- A.3.2.3.1 Purpose
- A.3.2.3.2 Requirements
- A.3.2.3.3 Procedure
- + A.3.2.4 RP backflow preventers — Test No. 3: Ch...
- A.3.2.4.1 Purpose
- A.3.2.4.2 Requirements
- A.3.2.4.3 Procedure
- + A.3.2.5 RP backflow preventers — Test No. 4: Pr...
- A.3.2.5.1 Purpose
- A.3.2.5.2 Requirements
- A.3.2.5.3 Procedure
- + A.3.2.6 RP backflow preventers — Test No. 5: St...
- A.3.2.6.1 Purpose
- A.3.2.6.2 Requirements
- A.3.2.6.3 Procedure
- A.3.2.7 Returning the RP backflow preventer to ...
- + A.4 DCVA backflow preventers — Testing procedur...
- A.4.1 Equipment required
- + A.4.2 DCVA backflow preventers — Test No. 1: Ch...
- A.4.2.1 Purpose
- A.4.2.2 Requirements
- A.4.2.3 Procedure
- + A.4.3 DCVA backflow preventers — Test No. 2: Ch...
- A.4.3.1 Purpose
- A.4.3.2 Requirements
- A.4.3.3 Procedure
- + A.4.4 DCVA backflow preventers — Test No. 3: St...
- A.4.4.1 Purpose
- A.4.4.2 Requirements
- A.4.4.3 Procedure
- A.4.5 Returning DCVA backflow preventers to ser...
- + A.5 DCVA backflow preventers — Field testing of...
- + A.5.1 DCVA backflow preventers — Testing proced...
- A.5.1.1 Equipment required
- + A.5.1.2 DCVA backflow preventers — Test No. 1: ...
- A.5.1.2.1 Purpose
- A.5.1.2.2 Requirements
- A.5.1.2.3 Procedure
- + A.5.1.2.4 Leaking shut-off valves
- A.5.1.2.4.1 Leaking shut-off valve 2 (with no p...
- A.5.1.2.4.2 Leaking shut-off valves 1 and 2 (wi...
- + A.5.1.3 DCVA backflow preventers — Test No. 2: ...
- A.5.1.3.1 Purpose
- A.5.1.3.2 Requirements
- A.5.1.3.3 Procedure
- + A.5.1.3.4 Leaking shut-off valves
- A.5.1.3.4.1 Leaking shut-off valve 2 (with no p...
- A.5.1.3.4.2 Leaking shut-off valves 1 and 2 (wi...
- + A.5.1.4 DCVA backflow preventers — Test No. 3: ...
- A.5.1.4.1 Purpose
- A.5.1.4.2 Requirements
- A.5.1.4.3 Procedure
- A.5.1.5 Returning DCVA backflow preventers to s...
- + A.5.2 DCVA backflow preventers — Testing proced...
- A.5.2.1 Equipment required
- + A.5.2.2 DCVA backflow preventers — Test No. 1: ...
- A.5.2.2.1 Purpose
- A.5.2.2.2 Requirements
- A.5.2.2.3 Procedure
- + A.5.2.2.4 Leaking shut-off valves
- A.5.2.2.4.1 Leaking shut-off valve 2 (with no p...
- A.5.2.2.4.2 Leaking shut-off valves 1 and 2 (wi...
- + A.5.2.3 DCVA backflow preventers — Test No. 2: ...
- A.5.2.3.1 Purpose
- A.5.2.3.2 Requirements
- A.5.2.3.3 Procedure
- + A.5.2.3.4 Leaking shut-off valves (see Figure A...
- A.5.2.3.4.1 Leaking shut-off valve 2 (with no p...
- A.5.2.3.4.2 Leaking shut-off valves 1 and 2 (wi...
- + A.5.2.4 DCVA backflow preventers — Test No. 3: ...
- A.5.2.4.1 Purpose
- A.5.2.4.2 Requirements
- A.5.2.4.3 Procedure
- A.5.2.5 Returning DCVA backflow preventers to s...
- + A.6 SRPVB devices — Field testing using a 3-val...
- A.6.1 Equipment required — 3-valve differential...
- + A.6.2 SRPVB devices — Test No. 1: Air inlet val...
- A.6.2.1 Purpose
- A.6.2.2 Requirements
- A.6.2.3 Procedure
- A.6.2.4 Leaking shut-off valves
- + A.6.3 SRPVB devices — Test No. 2: Check valve t...
- A.6.3.1 Purpose
- A.6.3.2 Requirements
- A.6.3.3 Procedure
- A.6.3.4 Leaking shut-off valves
- + A.6.4 SRPVB devices — Test No. 3: Static line p...
- A.6.4.1 Purpose
- A.6.4.2 Requirements
- A.6.4.3 Procedure
- A.6.5 Returning SRPVB devices to service
- + Annex B (informative)
- + B.1 School accreditation and tester certificati...
- B.1.1 School accreditation
- + B.1.2 Tester certification and re-certification...
- B.1.2.1 Qualification
- B.1.2.2 Active status
- B.1.2.3 Maintenance
- B.1.2.4 Unacceptable test reports
- B.1.2.5 Re-certification
- B.1.3 Tester licensing and registration
B64.10:YY
Selection and installation of backflow preventers
1.1 Application
This Standard specifies requirements for the selection and installation of backflow preventers. Additional information on how backflow due to back siphonage and back pressure occurs, and how to select and apply specific devices, is included in Annexes A, B, and C.
1.2 Exclusions
1.2.1 Product exclusions
This Standard does not cover
construction requirements or performance tests, which are covered by the CSA B64 Series;
plumbing supply fittings, which are covered by ASME A112.18.1/CSA B125.1;
plumbing fittings, which are covered by CSA B125.3; and
manually operated valves for use in plumbing systems, which are covered by ASME A112.4.14/CSA B125.14.
1.2.2 Other exclusions
This Standard does not specify requirements for maintenance or field testing after the initial installation. Such requirements are specified in CSA B64.10.1.
1.3 Terminology
In CSA standards, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the standard.
Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.
Notes to tables and figures are considered part of the table or figure and may be written as requirements.
Annexes are designated normative (mandatory) or informative (nonmandatory) to define their application.
B64.10.1:YY
Maintenance and field testing of backflow preventers
1.1 General
This Standard specifies requirements for the maintenance and field testing of backflow preventers.
1.2 Exclusions
This Standard does not specify requirements for the selection and installation of backflow preventers. Such requirements are specified in CSA B64.10.
1.3 Terminology
In CSA standards, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the standard.
Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.
Notes to tables and figures are considered part of the table or figure and may be written as requirements.
Annexes are designated normative (mandatory) or informative (nonmandatory) to define their application.
1.4 Units of record
This Standard is written in SI (metric) units. For conversion tables, see Annex D of CSA B64.10. Vacuum is expressed in pressure below ambient.
You may comment on any section of this document by clicking the “Submit Comment” link at the bottom of the relevant section.