AS/NZS 2845.1:2022
Water supply - Backflow prevention devices - Part 1: Materials, design and performance requirements
Standards New Zealand
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Sections
- 1Scope and general
- 2Materials
- 3Common design and performance requirements
- 4Atmospheric vacuum breaker (AVB)
- 5Hose connection vacuum breaker (HCVB)
- 6Dual check valve with atmospheric port (DCAP)
- 7Dual check valve (dual CV)
- 8Dual check valve with intermediate vent (Du CV)
- 9Pressure type vacuum breaker (PVB)
- 10Double check valve (DCV)
- 11Double check detector assembly (DCDA)
- 12Reduced pressure zone device (RPZD)
- 13Reduced pressure detector assembly (RPDA)
- 14Spill-resistant pressure vacuum breaker (SPVB)
- 15Beverage dispenser dual check valve with atmospheric port (BDDC)
- 16Pipe interrupter device (PID)
- 17Single check valve (testable) (SCVT)
- 18Single check detector assembly (testable) (SCDAT)
- 19Marking and packaging
- 20Manufacturer’s data
- A(normative) Product conformity evaluation
- B(normative) Testing apparatus, test sequence and instrumentation requirements
- C(normative) Torque test on screwed-in end devices
- D(normative) Test for ability to withstand continuous pressure — Devices intended for heated water applications
- E(normative) Positive pressure test
- F(normative) Reverse pressure test
- 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)
- H(normative) Water rise test — Atmospheric vacuum breaker (AVB), pressure type vacuum breaker (PVB) and spill-resistant pressure vacuum breaker (SPVB)
- I(normative) Endurance test — Atmospheric vacuum breaker (AVB)
- J(normative) Rated flow and pressure loss test
- K(normative) Ventilation valve leakage test — Atmospheric vacuum breaker (AVB)
- L(normative) Determination of critical level — Atmospheric vacuum breaker (AVB), pressure-type Vacuum Breaker (PVB) and spill-resistant pressure vacuum breaker (SPVB)
- M(normative) Test for leakage from air ports — Hose connection vacuum breaker (HCVB) and dual check valve with intermediate vent (Du CV)
- N(normative) Test for resistance to bending — Hose connection vacuum breaker (HCVB)
- O(normative) Test for resistance and relief of backpressure — Hose connection vacuum breaker (HCVB)
- P(normative) Backpressure test — Hose connection vacuum breaker (HCVB)
- Q(normative) Test for back-siphonage — Hose connection vacuum breaker (HCVB) and dual check valve with atmospheric port (DCAP)
- R(normative) Test for rated water flow capacity and pressure loss — Hose connection vacuum breaker (HCVB)
- S(normative) Endurance test — Hose connection vacuum breaker (HCVB)
- T(normative) Non-return valve closing pressure test
- 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)
- 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)
- W(normative) Ventilation valve opening pressure test — Dual check valve with atmospheric port (DCAP) and beverage dispenser dual check valve with atmospheric port (BDDC)
- X(normative) Test for back-siphonage under backpressure — Dual check valve with atmospheric port (DCAP)
- Y(normative) Testing installation for tests of Appendices D, E, J, K, L, R and Z
- Z(normative) Test for flow rate at low supply pressure — Dual check valve with atmospheric port (DCAP)
- AA(normative) Endurance test — Dual check valve with atmospheric port (DCAP)
- 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
- CC(normative) Back-siphonage test — Dual check valve with intermediate vent (Du CV)
- DD(normative) Ventilation valve opening pressure test — Pressure type vacuum breaker (PVB) and spill-resistant pressure vacuum breaker (SPVB)
- EE(normative) Endurance test — Pressure-type vacuum breaker (PVB) and spill-resistant pressure vacuum breaker (SPVB)
- FF(normative) Intermediate chamber pressure test — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPDA)
- 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)
- 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)
- 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)
- JJ(normative) Determination of pressure differential at which relief valve commences to open — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPDA)
- 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)
- LL(normative) Back-siphonage test — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPDA)
- MM(normative) Backpressure test — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPDA)
- NN(normative) Endurance test — Reduced pressure zone device (RPZD) and reduced pressure detector assembly (RPZA)
- OO(normative) Stiction test — Resilient seat material
- PP(normative) Air port entry sealing test — Spill-resistant pressure vacuum breaker (SPVB)
- QQ(normative) Back-siphonage test — Beverage dispenser dual check valve with atmospheric port (BDDC)
- RR(normative) Endurance test — Beverage dispenser dual check valve with atmospheric port (BDDC)
- SS(normative) Requirements specific to plastics materials for device bodies