NZS 4510:2022
Fire hydrant systems
This revision of NZS 4510 introduces a number of changes to the 2008 edition. The purpose of this standard is to set out minimum technical and performance requirements for fire hydrant systems. Hydrant systems are primarily for fire brigades to use when they are dealing with fire emergencies in buildings, but hydrant systems can also be found outside buildings for use on exteriors and to cover external fire exposure and risk.
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NZS 4510:2022 Fire hydrant systems
Committee representation
Acknowledgement
Copyright
CONTENTS
Value statement
Referenced documents
Latest revisions
Review of standards
Foreword
1 GENERAL
1.1 Scope
1.2 Objectives
1.3 Interpretation
1.4 Definitions
1.5 Abbreviations
1.6 Notations
1.7 Formal interpretations
2 GENERAL REQUIREMENTS
2.1 Approval of a hydrant system
2.2 Vehicular access
2.3 Pipework and components
2.4 Seismic resistance
2.5 Hydrant protection
2.6 Labelling and signs
2.7 Preliminary approval of basic design decisions
2.8 Electrical bonding
3 DESIGN CRITERIA
3.1 Pressure required at outlet
3.2 Number and spacing of outlets
3.3 Required flow rates
3.4 Pressure requirement for booster pumps
3.5 Pipework to be charged with water
3.6 Optional provision of pressurised water source
4 HYDRANT OUTLETS
4.1 Locations
4.2 Enclosures
4.3 Outlet assembly
4.4 Fire protection
5 HYDRANT INLETS
5.1 Locations
5.2 Enclosures
5.3 Inlets
5.4 Other equipment in enclosure
5.5 Connection pipe to system
5.6 Fire brigade reference documents
5.7 Duplicated hydrant inlets
6 PIPEWORK AND PRESSURE CONTROL
6.1 Piping location
6.2 Piping sizing
6.3 Pressure control and test facilities
6.4 Gauges and valves
6.5 Hydraulic calculation
7 PUMPS
7.1 Pump set compliance
7.2 Pump casing pressure rating
7.3 Pump selection
7.4 Drivers
7.5 Pump starting and stopping
7.6 Pump set installation
7.7 Diesel fuel supply
7.8 Pump unit enclosure
7.9 Equipment supervision
8 BUILDING CONSTRUCTION AND DEMOLITION
8.1 Hydrant system availability during construction
8.2 Precautions during installation
8.3 Temporary inlets
8.4 Progressive inspections
8.5 Demolition
9 EXTENSIONS, ALTERATIONS, AND IMPAIRMENTS
9.1 Extensions and alterations
9.2 System impairments
9.3 Interruption to water supplies
10 INSPECTION, TESTING, AND MAINTENANCE
10.1 Acceptance tests and inspections
10.2 Routine tests and inspections
10.3 Maintenance
APPENDIX
APPENDIX A – GUIDELINES FOR NON-STANDARD DESIGNS
APPENDIX B – COMBINED SPRINKLER-AND-HYDRANT RISERS FORINCREASED RESILIENCE
APPENDIX C – SYSTEMS INSTALLED TO SUPERSEDED STANDARDS
APPENDIX D – FIRE HAZARD EXAMPLES
APPENDIX E – TRACE HEATING
APPENDIX F – DRY PIPE HYDRANT SYSTEM
APPENDIX G – DRY BARREL PILLAR HYDRANTS FOR EXTERNAL USE
APPENDIX H – RECOMMENDATIONS FOR FROST-PROTECTION MEASURESFOR FIRE HYDRANT SYSTEMS IN COLD CLIMATE REGIONS
APPENDIX J – SIGNS
APPENDIX K – DRAWING CONVENTIONS FOR USE INHYDRANT SYSTEM DIAGRAMS
APPENDIX L – FIRE SYSTEM SHUTDOWN NOTIFICATION FORM
APPENDIX M – CONTACT DETAILS OF AGENCIES TO BE INFORMED WHENA HYDRANT SYSTEM IS RENDERED INOPERATIVE
APPENDIX N – HYDRANT SYSTEM ISOLATION TAG
APPENDIX P – MATTERS DECLARED BY FIRE AND EMERGENCYNEW ZEALAND’S CHIEF EXECUTIVE
TABLES
Table 1 – Maximum working pressures of pipes to AS 1074 or BS EN 10255
Table 2a – Maximum allowed arc length – Low fire hazard
Table 2b – Maximum allowed arc length – High fire hazard
Table 3 – Determination of design number of simultaneous hose streams in unsprinklered buildings
Table 4 – Hazen-Williams C values
Table 5 – Equivalent length factors for various fittings
Table D1 – Low fire hazard examples
Table D2 – High fire hazard examples
Table J1 – Proportion of lettering
Table J2 – Safety colours
Table K1 – Drawing conventions for use on hydrant system diagrams
FIGURES
Figure 1a – Low-rise building – Hose run/arc coverage shortage
Figure 1b – Low-rise building – Addition of external hydrant to provide hose run coverage
Figure 1c – Low-rise building – Addition of safe path to provide hose run coverage
Figure 1d – Hydrants in horizontal safe paths
Figure 2 – Measurement of hose length
Figure 3 – Hydrant outlet enclosure – Section view
Figure 4 – Details of a triangular door lock
Figure 5a – Hydrant outlet – Section view
Figure 5b – Hydrant outlet – Plan view
Figure 5c – Hydrant outlet – Handwheel and lever-action lug outlet – Section view
Figure 5d – Hydrant outlet – Handwheel and lever-action lug outlet – Plan view
Figure 6a – Unsprinklered building – Hydrant outlet protection – Fire rating options with doors – Plan view
Figure 6b – Unsprinklered building – Hydrant outlet protection – Fire rating options at building corners – Plan view
Figure 6c – Unsprinklered building – Hydrant outlet protection – Fire rating required – Section view
Figure 6d – Unsprinklered building – Hydrant outlet protection – Separation distance option – Plan view
Figure 6e – Unsprinklered building – Hydrant outlet protection – Separation distance option – Section view
Figure 6f – Sprinklered building – Hydrant outlet protection – No distance required – Plan view
Figure 6g – Sprinklered building – Hydrant outlet protection – No distance required – Section view
Figure 7 – Hydrant inlet standard requirements
Figure 8 – Pressure-reducing zones – Single-outlet reducing valves
Figure 9 – Pressure-reducing zones – Multiple-outlet reducing valves
Figure 10 – Typical pressure-reducing valve station
Figure 11 – Multistage pump pressure control
Figure 12 – Indicative flow test arrangements for buildings with multiple risers
Figure 13 – Pump unit installation – Arrangement for single booster
Figure 14 – Pump unit installation – Arrangement for dual boosters
Figure A1 – Outlet located at the end of a fire-rated corridor
Figure A2 – Use of smoke control to protect hydrant outlets
Figure B1 – Combined fire sprinkler-and-hydrant riser for increased resilience – Two-riser layout
Figure B2 – Combined fire sprinkler-and-hydrant riser for increased resilience – Three-riser layout
Figure B3 – Typical zone-control valve station
Figure B4 – Combined fire sprinkler-and-hydrant riser for increased resilience – During construction
Figure F1 – Supervised dry pipe hydrant system
Figure G1 – Dry pillar hydrant
Figure J1 – Proportion of lettering
Figure L1 – Fire system shutdown form
Figure N1 – Typical isolation tag card
- C1
- C2
- C3
- C4
- C5
- C6
Previous versions
- DZ 4510:2021 - PC Round 1 Download
-
NZS 4510:1998
Download
- C1
- C2
- C3
- C4
- C5
- C6
-
NZS 4510:1978
Download
- C1
- C2
- C3
- C4
- C5
- C6
- DZ 4510:2021 - PC Round 1
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References
Qualification of welders for fusion welding of steels - Additional requirements for Australia and New Zealand
Electrical installations - Classification of the fire and mechanical performance of wiring system elements
Conformity assessment - Requirements for the operation of various types of bodies performing inspection
Seismic performance of engineering systems in buildings
Hand operated fire-fighting equipment
Code of practice for riser mains for fire service use
Fire hydrant systems for buildings
Fire hydrant systems for buildings
Fire detection and alarm systems in buildings
Fire sprinkler systems for residential occupancies
Automatic fire sprinkler systems
Code of practice for safety in welding and cutting
Code of practice for industrial identification by colour, wording or other coding
Firefighting waterway equipment
Related Information
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AS/NZS 1221:1997
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AS/NZS 1221:1997 A1
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AS/NZS 1841.1:2007
Portable fire extinguishers - General requirements
-
AS/NZS 1841.2:2007
Portable fire extinguishers - Specific requirements for water type extinguishers
NZS 4510:2022 Fire hydrant systems
Committee representation
Acknowledgement
Copyright
CONTENTS
Value statement
Referenced documents
Latest revisions
Review of standards
Foreword
1 GENERAL
1.1 Scope
1.2 Objectives
1.3 Interpretation
1.4 Definitions
1.5 Abbreviations
1.6 Notations
1.7 Formal interpretations
2 GENERAL REQUIREMENTS
2.1 Approval of a hydrant system
2.2 Vehicular access
2.3 Pipework and components
2.4 Seismic resistance
2.5 Hydrant protection
2.6 Labelling and signs
2.7 Preliminary approval of basic design decisions
2.8 Electrical bonding
3 DESIGN CRITERIA
3.1 Pressure required at outlet
3.2 Number and spacing of outlets
3.3 Required flow rates
3.4 Pressure requirement for booster pumps
3.5 Pipework to be charged with water
3.6 Optional provision of pressurised water source
4 HYDRANT OUTLETS
4.1 Locations
4.2 Enclosures
4.3 Outlet assembly
4.4 Fire protection
5 HYDRANT INLETS
5.1 Locations
5.2 Enclosures
5.3 Inlets
5.4 Other equipment in enclosure
5.5 Connection pipe to system
5.6 Fire brigade reference documents
5.7 Duplicated hydrant inlets
6 PIPEWORK AND PRESSURE CONTROL
6.1 Piping location
6.2 Piping sizing
6.3 Pressure control and test facilities
6.4 Gauges and valves
6.5 Hydraulic calculation
7 PUMPS
7.1 Pump set compliance
7.2 Pump casing pressure rating
7.3 Pump selection
7.4 Drivers
7.5 Pump starting and stopping
7.6 Pump set installation
7.7 Diesel fuel supply
7.8 Pump unit enclosure
7.9 Equipment supervision
8 BUILDING CONSTRUCTION AND DEMOLITION
8.1 Hydrant system availability during construction
8.2 Precautions during installation
8.3 Temporary inlets
8.4 Progressive inspections
8.5 Demolition
9 EXTENSIONS, ALTERATIONS, AND IMPAIRMENTS
9.1 Extensions and alterations
9.2 System impairments
9.3 Interruption to water supplies
10 INSPECTION, TESTING, AND MAINTENANCE
10.1 Acceptance tests and inspections
10.2 Routine tests and inspections
10.3 Maintenance
APPENDIX
APPENDIX A – GUIDELINES FOR NON-STANDARD DESIGNS
APPENDIX B – COMBINED SPRINKLER-AND-HYDRANT RISERS FORINCREASED RESILIENCE
APPENDIX C – SYSTEMS INSTALLED TO SUPERSEDED STANDARDS
APPENDIX D – FIRE HAZARD EXAMPLES
APPENDIX E – TRACE HEATING
APPENDIX F – DRY PIPE HYDRANT SYSTEM
APPENDIX G – DRY BARREL PILLAR HYDRANTS FOR EXTERNAL USE
APPENDIX H – RECOMMENDATIONS FOR FROST-PROTECTION MEASURESFOR FIRE HYDRANT SYSTEMS IN COLD CLIMATE REGIONS
APPENDIX J – SIGNS
APPENDIX K – DRAWING CONVENTIONS FOR USE INHYDRANT SYSTEM DIAGRAMS
APPENDIX L – FIRE SYSTEM SHUTDOWN NOTIFICATION FORM
APPENDIX M – CONTACT DETAILS OF AGENCIES TO BE INFORMED WHENA HYDRANT SYSTEM IS RENDERED INOPERATIVE
APPENDIX N – HYDRANT SYSTEM ISOLATION TAG
APPENDIX P – MATTERS DECLARED BY FIRE AND EMERGENCYNEW ZEALAND’S CHIEF EXECUTIVE
TABLES
Table 1 – Maximum working pressures of pipes to AS 1074 or BS EN 10255
Table 2a – Maximum allowed arc length – Low fire hazard
Table 2b – Maximum allowed arc length – High fire hazard
Table 3 – Determination of design number of simultaneous hose streams in unsprinklered buildings
Table 4 – Hazen-Williams C values
Table 5 – Equivalent length factors for various fittings
Table D1 – Low fire hazard examples
Table D2 – High fire hazard examples
Table J1 – Proportion of lettering
Table J2 – Safety colours
Table K1 – Drawing conventions for use on hydrant system diagrams
FIGURES
Figure 1a – Low-rise building – Hose run/arc coverage shortage
Figure 1b – Low-rise building – Addition of external hydrant to provide hose run coverage
Figure 1c – Low-rise building – Addition of safe path to provide hose run coverage
Figure 1d – Hydrants in horizontal safe paths
Figure 2 – Measurement of hose length
Figure 3 – Hydrant outlet enclosure – Section view
Figure 4 – Details of a triangular door lock
Figure 5a – Hydrant outlet – Section view
Figure 5b – Hydrant outlet – Plan view
Figure 5c – Hydrant outlet – Handwheel and lever-action lug outlet – Section view
Figure 5d – Hydrant outlet – Handwheel and lever-action lug outlet – Plan view
Figure 6a – Unsprinklered building – Hydrant outlet protection – Fire rating options with doors – Plan view
Figure 6b – Unsprinklered building – Hydrant outlet protection – Fire rating options at building corners – Plan view
Figure 6c – Unsprinklered building – Hydrant outlet protection – Fire rating required – Section view
Figure 6d – Unsprinklered building – Hydrant outlet protection – Separation distance option – Plan view
Figure 6e – Unsprinklered building – Hydrant outlet protection – Separation distance option – Section view
Figure 6f – Sprinklered building – Hydrant outlet protection – No distance required – Plan view
Figure 6g – Sprinklered building – Hydrant outlet protection – No distance required – Section view
Figure 7 – Hydrant inlet standard requirements
Figure 8 – Pressure-reducing zones – Single-outlet reducing valves
Figure 9 – Pressure-reducing zones – Multiple-outlet reducing valves
Figure 10 – Typical pressure-reducing valve station
Figure 11 – Multistage pump pressure control
Figure 12 – Indicative flow test arrangements for buildings with multiple risers
Figure 13 – Pump unit installation – Arrangement for single booster
Figure 14 – Pump unit installation – Arrangement for dual boosters
Figure A1 – Outlet located at the end of a fire-rated corridor
Figure A2 – Use of smoke control to protect hydrant outlets
Figure B1 – Combined fire sprinkler-and-hydrant riser for increased resilience – Two-riser layout
Figure B2 – Combined fire sprinkler-and-hydrant riser for increased resilience – Three-riser layout
Figure B3 – Typical zone-control valve station
Figure B4 – Combined fire sprinkler-and-hydrant riser for increased resilience – During construction
Figure F1 – Supervised dry pipe hydrant system
Figure G1 – Dry pillar hydrant
Figure J1 – Proportion of lettering
Figure L1 – Fire system shutdown form
Figure N1 – Typical isolation tag card
- C1
- C2
- C3
- C4
- C5
- C6
Previous versions
- DZ 4510:2021 - PC Round 1 Download
-
NZS 4510:1998
Download
- C1
- C2
- C3
- C4
- C5
- C6
-
NZS 4510:1978
Download
- C1
- C2
- C3
- C4
- C5
- C6
- DZ 4510:2021 - PC Round 1
NZS 4510:2022
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.