AS/NZS 2845.1:2022
Water supply – Backflow prevention devices, Part 1: Materials, design and performance requirements
Standard sets out requirements for the materials, design, performance and testing of mechanical backflow prevention devices that are used for the protection of water supplies, for health and safety and protection of the environment.
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AS/NZS 2845.1:2022 Backflow prevention devices Materials, design and performance requirements
Preface
1 Scope and general
1.1 Scope, demonstration of conformance and application
1.1.1 Scope
1.1.2 Product conformity evaluation
1.1.3 Application
1.2 Normative references
1.3 Terms and definitions
1.4 Testing apparatus, testing sequence and instrumentation
1.5 Designation of size
1.6 Classification
1.7 Allowable pressures
2 Materials
2.1 General
2.2 Stainless steel
2.3 Filler metals for brazing or soldering
2.4 Nickel-copper-iron
2.5 Ferrous materials
2.5.1 General
2.5.2 Coating design
2.6 Copper
2.7 Copper alloy
2.8 Aluminium alloys
2.9 Corrosion-resistant metallic materials
2.10 Elastomeric materials
2.11 Plastics
2.11.1 General
2.11.2 Plastics-bodied devices
2.11.3 Acetal
3 Common design and performance requirements
3.1 General
3.2 Effect on water
3.3 Pressure and temperature ranges
3.4 Design
3.4.1 Serviceability
3.4.2 Release of trapped air
3.4.3 Flexible valve seats and diaphragms
3.5 End connections
3.5.1 General
3.5.2 Hose connections
3.5.3 Test tap outlets
3.5.4 Water meter connection ends
3.6 Valve seating
3.7 Structural tests
3.7.1 General
3.7.2 Torque
3.7.3 Heated water
3.7.4 Positive pressure
3.7.5 Reverse pressure
3.7.6 Endurance
3.7.7 Non-testable devices (low hazard)
3.8 Sampling and frequency plans
4 Atmospheric vacuum breaker (AVB)
4.1 General
4.2 Components
4.2.1 Ventilation valve
4.2.2 Non-return valve
4.3 Specific design requirements
4.3.1 Air port shields
4.3.2 Critical level (CL) mark
4.4 Performance tests
4.4.1 Procedures
4.4.2 Air port opening area
4.4.3 Water rise
4.4.4 Rated flow and pressure loss
4.4.5 Ventilation valve leakage
4.4.6 Critical level
4.4.7 Endurance
4.4.8 Ability to resist adhesion between the ventilation valve sealing elements
4.5 Sampling and frequency plans
5 Hose connection vacuum breaker (HCVB)
5.1 General
5.2 Components
5.2.1 Ventilation valve
5.2.2 Non-return valve
5.3 Specific design requirements
5.3.1 Air ports locations
5.3.2 Air ports opening area
5.3.3 Security
5.4 Performance tests
5.4.1 Procedures
5.4.2 Leakage from air ports
5.4.3 Resistance to bending
5.4.4 Ability to resist and relieve backpressure
5.4.5 Backpressure
5.4.6 Back-siphonage
5.4.7 Rated flow and pressure loss
5.4.8 Endurance
5.5 Sampling and frequency plans
6 Dual check valve with atmospheric port (DCAP)
6.1 General
6.2 Components
6.2.1 Ventilation valve
6.2.2 Non-return valves
6.3 Specific design requirements
6.3.1 Airflow passage, cross-sectional area
6.3.2 Air port outlet
6.4 Performance tests
6.4.1 Procedures
6.4.2 Non-return valve closing pressure
6.4.3 Leakage from air ports
6.4.4 Backflow through upstream non-return valve
6.4.5 Ventilation valve opening pressure
6.4.6 Back-siphonage
6.4.7 Back-siphonage under backpressure
6.4.8 Rated flow and pressure loss
6.4.9 Flow with low supply pressure
6.4.10 Endurance
6.5 Sampling and frequency plans
7 Dual check valve (dual CV)
7.1 General
7.2 Components
7.3 Performance tests
7.3.1 Procedures
7.3.2 Non-return valve closing pressure
7.3.3 Rated flow and pressure loss
7.3.4 Endurance
7.4 Sampling and frequency plans
8 Dual check valve with intermediate vent (Du CV)
8.1 General
8.2 Components
8.2.1 Ventilation valve
8.2.2 Non-return valves
8.3 Specific design requirements
8.3.1 Air port locations
8.3.2 Air ports opening area
8.4 Performance tests
8.4.1 Procedures
8.4.2 Non-return valve closing pressure
8.4.3 Minimum flow capacity and pressure loss
8.4.4 Intermediate vent device leakage
8.4.5 Back-siphonage
8.4.6 Endurance
8.5 Sampling and frequency plans
9 Pressure type vacuum breaker (PVB)
9.1 General
9.2 Components
9.2.1 Ventilation valve
9.2.2 Non-return valve
9.2.3 Test taps
9.3 Specific design requirements
9.3.1 Air port shields
9.3.2 Test taps
9.3.3 Critical level mark
9.4 Performance tests
9.4.1 Procedures
9.4.2 Non-return valve closing pressure
9.4.3 Ventilation valve opening pressure
9.4.4 Air port opening area
9.4.5 Water rise
9.4.6 Rated flow
9.4.7 Critical level
9.4.8 Endurance
9.4.9 Ability to resist adhesion between the ventilation valve sealing elements
9.5 Sampling and frequency plans
10 Double check valve (DCV)
10.1 General
10.2 Components
10.2.1 Non-return valve
10.2.2 Test taps
10.3 Specific design requirements
10.4 Performance tests
10.4.1 Procedures
10.4.2 Non-return valve closing pressure
10.4.3 Rated flow
10.4.4 Endurance
10.5 Sampling and frequency plans
11 Double check detector assembly (DCDA)
11.1 General
11.2 Components
11.2.1 Main double check valve
11.2.2 Bypass line
11.2.3 Water meter
11.2.4 Secondary double check valve
11.3 Performance test
11.3.1 Procedures
11.3.2 Pressure drop
11.3.3 Endurance
11.4 Sampling and frequency plans
12 Reduced pressure zone device (RPZD)
12.1 General
12.2 Components
12.2.1 Non-return valves
12.2.2 Relief valve
12.2.3 Test taps
12.3 Specific design requirements
12.3.1 Relief valve diaphragm or equivalent
12.3.2 Test taps
12.3.3 Relief valve opening
12.4 Performance tests
12.4.1 Procedures
12.4.2 Downstream non-return valve closing pressure
12.4.3 Intermediate chamber pressure
12.4.4 Supply pressure at which the intermediate chamber becomes atmospheric
12.4.5 Intermediate chamber pressure under backpressure conditions when the supply pressure is 14 kPa or greater
12.4.6 Intermediate chamber pressure under backpressure conditions, when the supply pressure is less than 14 kPa
12.4.7 Pressure differential at which relief valve commences to open
12.4.8 Supply pressure fluctuations and discharge from relief valve
12.4.9 Rated flow and pressure loss
12.4.10 Back-siphonage
12.4.11 Backpressure
12.4.12 Endurance
12.5 Sampling and frequency plans
13 Reduced pressure detector assembly (RPDA)
13.1 General
13.2 Components
13.2.1 Main reduced pressure zone valve
13.2.2 Bypass line
13.2.3 Water meter
13.2.4 Secondary reduced pressure zone device
13.3 Performance test
13.3.1 Procedures
13.3.2 Pressure drop
13.3.3 Endurance
13.4 Sampling and frequency plans
14 Spill-resistant pressure vacuum breaker (SPVB)
14.1 General
14.2 Components
14.2.1 Ventilation valve
14.2.2 Air port entry seal
14.2.3 Non-return valve
14.2.4 Test points
14.3 Specific design requirements
14.3.1 Air port shields
14.3.2 Test points
14.4 Performance tests
14.4.1 Procedures
14.4.2 Non-return valve closing pressure
14.4.3 Ventilation valve opening pressure
14.4.4 Air port entry seal
14.4.5 Air port opening area
14.4.6 Water rise
14.4.7 Rated flow and pressure loss
14.4.8 Critical level
14.4.9 Ability to resist adhesion between the ventilation valve sealing elements
14.4.10 Endurance
14.5 Sampling and frequency plans
15 Beverage dispenser dual check valve with atmospheric port (BDDC)
15.1 General
15.2 Components
15.2.1 Ventilation valve
15.2.2 Non-return valves
15.2.3 Air port
15.3 Specific design requirements
15.3.1 Air port
15.3.2 Air port shields
15.3.3 Air port opening area
15.3.4 Strainers
15.4 Performance tests
15.4.1 Procedures
15.4.2 Non-return valve closing pressure
15.4.3 Air port leakage
15.4.4 Backflow through upstream non-return valve
15.4.5 Ventilation valve opening pressure
15.4.6 Back-siphonage under backpressure
15.4.7 Rated flow and pressure loss
15.4.8 Ability to withstand continuous pressure
15.4.9 Endurance
15.5 Sampling and frequency plans
16 Pipe interrupter device (PID)
16.1 General
16.2 Components — Air inlets
16.3 Specific design requirements
16.3.1 Air ports
16.4 Performance test
16.4.1 Procedures
16.4.2 Torque test for screwed end devices
16.4.3 Air inlets
16.5 Sampling and frequency plans
17 Single check valve (testable) (SCVT)
17.1 General
17.2 Components
17.2.1 Non-return valve
17.2.2 Test taps
17.3 Specific design requirements
17.4 Performance tests
17.4.1 Procedures
17.4.2 Non-return valve closing pressure
17.4.3 Rated flow and pressure loss
17.4.4 Endurance
17.5 Sampling and frequency plans
18 Single check detector assembly (testable) (SCDAT)
18.1 General
18.2 Components
18.2.1 Main single check device
18.2.2 Bypass line
18.2.3 Water meter
18.2.4 Secondary check device
18.3 Performance tests
18.3.1 Procedures
18.3.2 Pressure drop
18.3.3 Endurance
18.4 Sampling and frequency plans
19 Marking and packaging
19.1 Marking
19.1.1 On the device
19.1.2 Nameplate or label
19.2 Packaging
20 Manufacturer’s data
20.1 Installation instructions
20.2 Maintenance instructions
Appendix A (normative) Product conformity evaluation
Appendix B (normative) Testing apparatus, test sequence and instrumentation requirements
Appendix C (normative) Torque test on screwed-in end devices
Appendix D (normative) Test for ability to withstand continuous pressure — Devices intended for heated water applications
Appendix E (normative) Positive pressure test
Appendix F (normative) Reverse pressure test
Appendix G (normative) Air port opening area test — Atmospheric vacuum breaker (AVB), pressure type vacuum breaker (PVB), spill-resistant pressure vacuum breaker (SPVB) and pipe interrupter device (PID)
Appendix H (normative) Water rise test — Atmospheric vacuum breaker (AVB), pressure type vacuum breaker (PVB) and spill-resistant pressure vacuum breaker (SPVB)
Appendix I (normative) Endurance test — Atmospheric vacuum breaker (AVB)
Appendix J (normative) Rated flow and pressure loss test
Appendix K (normative) Ventilation valve leakage test — Atmospheric vacuum breaker (AVB)
Appendix L (normative) Determination of critical level — Atmospheric vacuum breaker (AVB), pressure-type Vacuum Breaker (PVB) and spill-resistant pressure vacuum breaker (SPVB)
Appendix M (normative) Test for leakage from air ports — Hose connection vacuum breaker (HCVB) and dual check valve with intermediate vent (Du CV)
Appendix N (normative) Test for resistance to bending — Hose connection vacuum breaker (HCVB)
Appendix O (normative) Test for resistance and relief of backpressure — Hose connection vacuum breaker (HCVB)
Appendix P (normative) Backpressure test — Hose connection vacuum breaker (HCVB)
Appendix Q (normative) Test for back-siphonage — Hose connection vacuum breaker (HCVB) and dual check valve with atmospheric port (DCAP)
Appendix R (normative) Test for rated water flow capacity and pressure loss — Hose connection vacuum breaker (HCVB)
Appendix S (normative) Endurance test — Hose connection vacuum breaker (HCVB)
Appendix T (normative) Non-return valve closing pressure test
Appendix U (normative) Test for leakage from air ports — Dual check valve with atmospheric port (DCAP) and beverage dispenser dual check valve with atmospheric port (BDDC)
Appendix V (normative) Test for backflow through upstream non-return valve—dual check valve with atmospheric port (DCAP) and beverage dispenser dual check valve with atmospheric port (BDDC)
Appendix W (normative) Ventilation valve opening pressure test — Dual check valve with atmospheric port (DCAP) and beverage dispenser dual check valve with atmospheric port (BDDC)
Appendix X (normative) Test for back-siphonage under backpressure — Dual check valve with atmospheric port (DCAP)
Appendix Y (normative) Testing installation for tests of Appendices D, E, J, K, L, R and Z
Appendix Z (normative) Test for flow rate at low supply pressure — Dual check valve with atmospheric port (DCAP)
Appendix AA (normative) Endurance test — Dual check valve with atmospheric port (DCAP)
Appendix BB (normative) Endurance test — Double check valve (DCA), dual check valve (Dual CV), dual check valve with intermediate vent (Du CV), double check detector assembly (DCDA), single check valve (testable) (SCVT) and single check detector assembly
Appendix CC (normative) Back-siphonage test — Dual check valve with intermediate vent (Du CV)
Appendix DD (normative) Ventilation valve opening pressure test — Pressure type vacuum breaker (PVB) and spill-resistant pressure vacuum breaker (SPVB)
Appendix EE (normative) Endurance test — Pressure-type vacuum breaker (PVB) and spill-resistant pressure vacuum breaker (SPVB)
Appendix FF (normative) Intermediate chamber pressure test — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPDA)
Appendix GG (normative) Determination of supply pressure at which pressure in the intermediate chamber becomes atmospheric — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPDA)
Appendix HH (normative) Determination of intermediate chamber pressure under backpressure conditions when the supply pressure is 14 kPa or greater — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPDA)
Appendix II (normative) Determination of intermediate chamber pressure under backpressure conditions when the supply pressure is less than 14 kPa — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPDA)
Appendix JJ (normative) Determination of pressure differential at which relief valve commences to open — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPDA)
Appendix KK (normative) Test for effect of supply pressure fluctuation on discharge from relief valve — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPDA)
Appendix LL (normative) Back-siphonage test — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPDA)
Appendix MM (normative) Backpressure test — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPDA)
Appendix NN (normative) Endurance test — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPZA)
Appendix OO (normative) Stiction test — Resilient seat material
Appendix PP (normative) Air port entry sealing test — Spill-resistant pressure vacuum breaker (SPVB)
Appendix QQ (normative) Back-siphonage test — Beverage dispenser dual check valve with atmospheric port (BDDC)
Appendix RR (normative) Endurance test — Beverage dispenser dual check valve with atmospheric port (BDDC)
Appendix SS (normative) Requirements specific to plastics materials for device bodies
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AS/NZS 2845.1:2022 Backflow prevention devices Materials, design and performance requirements
Preface
1 Scope and general
1.1 Scope, demonstration of conformance and application
1.1.1 Scope
1.1.2 Product conformity evaluation
1.1.3 Application
1.2 Normative references
1.3 Terms and definitions
1.4 Testing apparatus, testing sequence and instrumentation
1.5 Designation of size
1.6 Classification
1.7 Allowable pressures
2 Materials
2.1 General
2.2 Stainless steel
2.3 Filler metals for brazing or soldering
2.4 Nickel-copper-iron
2.5 Ferrous materials
2.5.1 General
2.5.2 Coating design
2.6 Copper
2.7 Copper alloy
2.8 Aluminium alloys
2.9 Corrosion-resistant metallic materials
2.10 Elastomeric materials
2.11 Plastics
2.11.1 General
2.11.2 Plastics-bodied devices
2.11.3 Acetal
3 Common design and performance requirements
3.1 General
3.2 Effect on water
3.3 Pressure and temperature ranges
3.4 Design
3.4.1 Serviceability
3.4.2 Release of trapped air
3.4.3 Flexible valve seats and diaphragms
3.5 End connections
3.5.1 General
3.5.2 Hose connections
3.5.3 Test tap outlets
3.5.4 Water meter connection ends
3.6 Valve seating
3.7 Structural tests
3.7.1 General
3.7.2 Torque
3.7.3 Heated water
3.7.4 Positive pressure
3.7.5 Reverse pressure
3.7.6 Endurance
3.7.7 Non-testable devices (low hazard)
3.8 Sampling and frequency plans
4 Atmospheric vacuum breaker (AVB)
4.1 General
4.2 Components
4.2.1 Ventilation valve
4.2.2 Non-return valve
4.3 Specific design requirements
4.3.1 Air port shields
4.3.2 Critical level (CL) mark
4.4 Performance tests
4.4.1 Procedures
4.4.2 Air port opening area
4.4.3 Water rise
4.4.4 Rated flow and pressure loss
4.4.5 Ventilation valve leakage
4.4.6 Critical level
4.4.7 Endurance
4.4.8 Ability to resist adhesion between the ventilation valve sealing elements
4.5 Sampling and frequency plans
5 Hose connection vacuum breaker (HCVB)
5.1 General
5.2 Components
5.2.1 Ventilation valve
5.2.2 Non-return valve
5.3 Specific design requirements
5.3.1 Air ports locations
5.3.2 Air ports opening area
5.3.3 Security
5.4 Performance tests
5.4.1 Procedures
5.4.2 Leakage from air ports
5.4.3 Resistance to bending
5.4.4 Ability to resist and relieve backpressure
5.4.5 Backpressure
5.4.6 Back-siphonage
5.4.7 Rated flow and pressure loss
5.4.8 Endurance
5.5 Sampling and frequency plans
6 Dual check valve with atmospheric port (DCAP)
6.1 General
6.2 Components
6.2.1 Ventilation valve
6.2.2 Non-return valves
6.3 Specific design requirements
6.3.1 Airflow passage, cross-sectional area
6.3.2 Air port outlet
6.4 Performance tests
6.4.1 Procedures
6.4.2 Non-return valve closing pressure
6.4.3 Leakage from air ports
6.4.4 Backflow through upstream non-return valve
6.4.5 Ventilation valve opening pressure
6.4.6 Back-siphonage
6.4.7 Back-siphonage under backpressure
6.4.8 Rated flow and pressure loss
6.4.9 Flow with low supply pressure
6.4.10 Endurance
6.5 Sampling and frequency plans
7 Dual check valve (dual CV)
7.1 General
7.2 Components
7.3 Performance tests
7.3.1 Procedures
7.3.2 Non-return valve closing pressure
7.3.3 Rated flow and pressure loss
7.3.4 Endurance
7.4 Sampling and frequency plans
8 Dual check valve with intermediate vent (Du CV)
8.1 General
8.2 Components
8.2.1 Ventilation valve
8.2.2 Non-return valves
8.3 Specific design requirements
8.3.1 Air port locations
8.3.2 Air ports opening area
8.4 Performance tests
8.4.1 Procedures
8.4.2 Non-return valve closing pressure
8.4.3 Minimum flow capacity and pressure loss
8.4.4 Intermediate vent device leakage
8.4.5 Back-siphonage
8.4.6 Endurance
8.5 Sampling and frequency plans
9 Pressure type vacuum breaker (PVB)
9.1 General
9.2 Components
9.2.1 Ventilation valve
9.2.2 Non-return valve
9.2.3 Test taps
9.3 Specific design requirements
9.3.1 Air port shields
9.3.2 Test taps
9.3.3 Critical level mark
9.4 Performance tests
9.4.1 Procedures
9.4.2 Non-return valve closing pressure
9.4.3 Ventilation valve opening pressure
9.4.4 Air port opening area
9.4.5 Water rise
9.4.6 Rated flow
9.4.7 Critical level
9.4.8 Endurance
9.4.9 Ability to resist adhesion between the ventilation valve sealing elements
9.5 Sampling and frequency plans
10 Double check valve (DCV)
10.1 General
10.2 Components
10.2.1 Non-return valve
10.2.2 Test taps
10.3 Specific design requirements
10.4 Performance tests
10.4.1 Procedures
10.4.2 Non-return valve closing pressure
10.4.3 Rated flow
10.4.4 Endurance
10.5 Sampling and frequency plans
11 Double check detector assembly (DCDA)
11.1 General
11.2 Components
11.2.1 Main double check valve
11.2.2 Bypass line
11.2.3 Water meter
11.2.4 Secondary double check valve
11.3 Performance test
11.3.1 Procedures
11.3.2 Pressure drop
11.3.3 Endurance
11.4 Sampling and frequency plans
12 Reduced pressure zone device (RPZD)
12.1 General
12.2 Components
12.2.1 Non-return valves
12.2.2 Relief valve
12.2.3 Test taps
12.3 Specific design requirements
12.3.1 Relief valve diaphragm or equivalent
12.3.2 Test taps
12.3.3 Relief valve opening
12.4 Performance tests
12.4.1 Procedures
12.4.2 Downstream non-return valve closing pressure
12.4.3 Intermediate chamber pressure
12.4.4 Supply pressure at which the intermediate chamber becomes atmospheric
12.4.5 Intermediate chamber pressure under backpressure conditions when the supply pressure is 14 kPa or greater
12.4.6 Intermediate chamber pressure under backpressure conditions, when the supply pressure is less than 14 kPa
12.4.7 Pressure differential at which relief valve commences to open
12.4.8 Supply pressure fluctuations and discharge from relief valve
12.4.9 Rated flow and pressure loss
12.4.10 Back-siphonage
12.4.11 Backpressure
12.4.12 Endurance
12.5 Sampling and frequency plans
13 Reduced pressure detector assembly (RPDA)
13.1 General
13.2 Components
13.2.1 Main reduced pressure zone valve
13.2.2 Bypass line
13.2.3 Water meter
13.2.4 Secondary reduced pressure zone device
13.3 Performance test
13.3.1 Procedures
13.3.2 Pressure drop
13.3.3 Endurance
13.4 Sampling and frequency plans
14 Spill-resistant pressure vacuum breaker (SPVB)
14.1 General
14.2 Components
14.2.1 Ventilation valve
14.2.2 Air port entry seal
14.2.3 Non-return valve
14.2.4 Test points
14.3 Specific design requirements
14.3.1 Air port shields
14.3.2 Test points
14.4 Performance tests
14.4.1 Procedures
14.4.2 Non-return valve closing pressure
14.4.3 Ventilation valve opening pressure
14.4.4 Air port entry seal
14.4.5 Air port opening area
14.4.6 Water rise
14.4.7 Rated flow and pressure loss
14.4.8 Critical level
14.4.9 Ability to resist adhesion between the ventilation valve sealing elements
14.4.10 Endurance
14.5 Sampling and frequency plans
15 Beverage dispenser dual check valve with atmospheric port (BDDC)
15.1 General
15.2 Components
15.2.1 Ventilation valve
15.2.2 Non-return valves
15.2.3 Air port
15.3 Specific design requirements
15.3.1 Air port
15.3.2 Air port shields
15.3.3 Air port opening area
15.3.4 Strainers
15.4 Performance tests
15.4.1 Procedures
15.4.2 Non-return valve closing pressure
15.4.3 Air port leakage
15.4.4 Backflow through upstream non-return valve
15.4.5 Ventilation valve opening pressure
15.4.6 Back-siphonage under backpressure
15.4.7 Rated flow and pressure loss
15.4.8 Ability to withstand continuous pressure
15.4.9 Endurance
15.5 Sampling and frequency plans
16 Pipe interrupter device (PID)
16.1 General
16.2 Components — Air inlets
16.3 Specific design requirements
16.3.1 Air ports
16.4 Performance test
16.4.1 Procedures
16.4.2 Torque test for screwed end devices
16.4.3 Air inlets
16.5 Sampling and frequency plans
17 Single check valve (testable) (SCVT)
17.1 General
17.2 Components
17.2.1 Non-return valve
17.2.2 Test taps
17.3 Specific design requirements
17.4 Performance tests
17.4.1 Procedures
17.4.2 Non-return valve closing pressure
17.4.3 Rated flow and pressure loss
17.4.4 Endurance
17.5 Sampling and frequency plans
18 Single check detector assembly (testable) (SCDAT)
18.1 General
18.2 Components
18.2.1 Main single check device
18.2.2 Bypass line
18.2.3 Water meter
18.2.4 Secondary check device
18.3 Performance tests
18.3.1 Procedures
18.3.2 Pressure drop
18.3.3 Endurance
18.4 Sampling and frequency plans
19 Marking and packaging
19.1 Marking
19.1.1 On the device
19.1.2 Nameplate or label
19.2 Packaging
20 Manufacturer’s data
20.1 Installation instructions
20.2 Maintenance instructions
Appendix A (normative) Product conformity evaluation
Appendix B (normative) Testing apparatus, test sequence and instrumentation requirements
Appendix C (normative) Torque test on screwed-in end devices
Appendix D (normative) Test for ability to withstand continuous pressure — Devices intended for heated water applications
Appendix E (normative) Positive pressure test
Appendix F (normative) Reverse pressure test
Appendix G (normative) Air port opening area test — Atmospheric vacuum breaker (AVB), pressure type vacuum breaker (PVB), spill-resistant pressure vacuum breaker (SPVB) and pipe interrupter device (PID)
Appendix H (normative) Water rise test — Atmospheric vacuum breaker (AVB), pressure type vacuum breaker (PVB) and spill-resistant pressure vacuum breaker (SPVB)
Appendix I (normative) Endurance test — Atmospheric vacuum breaker (AVB)
Appendix J (normative) Rated flow and pressure loss test
Appendix K (normative) Ventilation valve leakage test — Atmospheric vacuum breaker (AVB)
Appendix L (normative) Determination of critical level — Atmospheric vacuum breaker (AVB), pressure-type Vacuum Breaker (PVB) and spill-resistant pressure vacuum breaker (SPVB)
Appendix M (normative) Test for leakage from air ports — Hose connection vacuum breaker (HCVB) and dual check valve with intermediate vent (Du CV)
Appendix N (normative) Test for resistance to bending — Hose connection vacuum breaker (HCVB)
Appendix O (normative) Test for resistance and relief of backpressure — Hose connection vacuum breaker (HCVB)
Appendix P (normative) Backpressure test — Hose connection vacuum breaker (HCVB)
Appendix Q (normative) Test for back-siphonage — Hose connection vacuum breaker (HCVB) and dual check valve with atmospheric port (DCAP)
Appendix R (normative) Test for rated water flow capacity and pressure loss — Hose connection vacuum breaker (HCVB)
Appendix S (normative) Endurance test — Hose connection vacuum breaker (HCVB)
Appendix T (normative) Non-return valve closing pressure test
Appendix U (normative) Test for leakage from air ports — Dual check valve with atmospheric port (DCAP) and beverage dispenser dual check valve with atmospheric port (BDDC)
Appendix V (normative) Test for backflow through upstream non-return valve—dual check valve with atmospheric port (DCAP) and beverage dispenser dual check valve with atmospheric port (BDDC)
Appendix W (normative) Ventilation valve opening pressure test — Dual check valve with atmospheric port (DCAP) and beverage dispenser dual check valve with atmospheric port (BDDC)
Appendix X (normative) Test for back-siphonage under backpressure — Dual check valve with atmospheric port (DCAP)
Appendix Y (normative) Testing installation for tests of Appendices D, E, J, K, L, R and Z
Appendix Z (normative) Test for flow rate at low supply pressure — Dual check valve with atmospheric port (DCAP)
Appendix AA (normative) Endurance test — Dual check valve with atmospheric port (DCAP)
Appendix BB (normative) Endurance test — Double check valve (DCA), dual check valve (Dual CV), dual check valve with intermediate vent (Du CV), double check detector assembly (DCDA), single check valve (testable) (SCVT) and single check detector assembly
Appendix CC (normative) Back-siphonage test — Dual check valve with intermediate vent (Du CV)
Appendix DD (normative) Ventilation valve opening pressure test — Pressure type vacuum breaker (PVB) and spill-resistant pressure vacuum breaker (SPVB)
Appendix EE (normative) Endurance test — Pressure-type vacuum breaker (PVB) and spill-resistant pressure vacuum breaker (SPVB)
Appendix FF (normative) Intermediate chamber pressure test — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPDA)
Appendix GG (normative) Determination of supply pressure at which pressure in the intermediate chamber becomes atmospheric — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPDA)
Appendix HH (normative) Determination of intermediate chamber pressure under backpressure conditions when the supply pressure is 14 kPa or greater — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPDA)
Appendix II (normative) Determination of intermediate chamber pressure under backpressure conditions when the supply pressure is less than 14 kPa — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPDA)
Appendix JJ (normative) Determination of pressure differential at which relief valve commences to open — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPDA)
Appendix KK (normative) Test for effect of supply pressure fluctuation on discharge from relief valve — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPDA)
Appendix LL (normative) Back-siphonage test — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPDA)
Appendix MM (normative) Backpressure test — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPDA)
Appendix NN (normative) Endurance test — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPZA)
Appendix OO (normative) Stiction test — Resilient seat material
Appendix PP (normative) Air port entry sealing test — Spill-resistant pressure vacuum breaker (SPVB)
Appendix QQ (normative) Back-siphonage test — Beverage dispenser dual check valve with atmospheric port (BDDC)
Appendix RR (normative) Endurance test — Beverage dispenser dual check valve with atmospheric port (BDDC)
Appendix SS (normative) Requirements specific to plastics materials for device bodies
Previous versions
AS/NZS 2845.1:2022
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