AS/NZS 3500.5:2012
Plumbing and drainage - Part 5: Housing installations
Specifies requirements for the design and installation of cold water services, heated water services, rainwater systems, water supply systems, greywater systems, sanitary plumbing and drainage systems and stormwater drainage systems. It is applicable to detached dwellings, multi-unit dwellings not exceeding three storeys in height, and communal residential community service buildings with a total floor area not exceeding 300 square metres. This Standard does not apply to requirements for dedicated firefighting systems.
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AS/NZS 3500.5:2012 PLUMBING AND DRAINAGE - HOUSING INSTALLATIONS
PREFACE
CONTENTS
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE
1.2 NORMATIVE REFERENCES
1.3 DEFINITIONS
1.4 APPLICATION
1.4.1 National Construction Code Volume 3-Plumbing Code of Australia
1.4.2 National Construction Code (NCC)
1.4.3 New Zealand Building Code
1.4.4 Classes of buildings
1.5 AUTHORIZATION
1.6 SELECTION AND USE OF MATERIALS AND PRODUCTS
1.7 TERMITE MANAGEMENT
1.8 PLUMBING AND DRAINAGE INSTALLATIONS IN FILLED, UNSTABLE, EXPANSIVE, WATER-CHARGED OR REACTIVE GROUND
1.9 ELECTRICAL SAFETY PRECAUTIONS AND EARTHING
1.10 FACILITIES FOR PEOPLE WITH DISABILITIES
1.11 STRUCTURAL CONCRETE OR BRICKWORK
1.12 ALTERNATIVE DESIGNS AND METHODS OF INSTALLATION
SECTION 2 WATER SERVICES
2.1 SCOPE
2.2 EQUIVALENT PIPE SIZES
2.3 LIMITATIONS ON THE USE OF PIPES AND FITTINGS
2.3.1 General
2.3.2 Plastics pipes and fittings
2.3.3 Metallic pipes and fittings
2.4 METHODS OF JOINTING
2.4.1 General
2.4.2 Threading
2.4.3 Capillary fitting
2.4.4 Compression joints
2.4.5 Silver brazing
2.4.6 Soft soldering
2.4.7 Solvent cement joints and priming fluid
2.5 PRESSURE AND FLOW RATE REQUIREMENTS OF WATER SERVICES
2.5.1 General
2.5.2 Available pressure
2.5.3 Minimum pressures and delivery flow rates
2.5.4 Availability of water supply
2.5.5 Velocity requirements
2.5.6 Pipe size limitations
2.5.7 Sizing of piping for dwellings
2.6 WATER METERS
2.6.1 General
2.6.2 Installation inside buildings
2.6.3 Installation below ground
2.6.4 Protection from mechanical damage
2.6.5 Frost protection
2.7 PROXIMITY TO OTHER SERVICES
2.8 ISOLATING VALVES
2.8.1 General
2.8.2 Location
2.8.3 Maintenance
2.8.4 Multiple dwellings
2.9 DEPTH OF COVER
2.9.1 General
2.9.2 Bedding and backfill
2.10 PROTECTION AGAINST FREEZING
2.10.1 Requirement for protection
2.10.2 Piping located outside buildings
2.10.3 Pipes located on metal roofs
2.10.4 Pipes located inside buildings
2.10.5 Insulation of piping
2.11 BUSHFIRE ZONES
2.12 CORROSIVE AREAS
2.12.1 General
2.12.2 Jointing of dissimilar metallic pipes and fittings
2.13 LOCATION OF PIPING
2.13.1 Location
2.13.2 Concealed piping
2.13.3 Chases, ducts or conduits
2.13.4 Under concrete slabs
2.14 SUPPORT AND FIXING OF PIPES-ABOVE THE GROUND
2.14.1 General
2.14.2 Brackets, clips and hangers
2.14.3 Prohibited supports
2.14.4 Spacing
2.14.5 Securing of pipes, fittings and valves
2.15 STANDPIPES
2.16 PROTECTION OF WATER SUPPLIES
2.16.1 Design
2.16.2 Quality of drinking water supply
2.16.3 Protection against contaminants
2.16.4 Alternative water supplies
2.17 NON-DRINKING WATER SERVICES
2.17.1 General
2.17.2 Cross-connection control
2.17.3 Material and products
2.17.4 Installation requirements
2.17.5 Non-drinking water services and outlets
2.18 TESTING AND COMMISSIONING A NON-DRINKING WATER SERVICE
2.19 TREATED GREYWATER SERVICES
2.19.1 General
2.19.2 Cross-connection control
2.19.3 Protection of other water supplies from treated greywater
2.19.4 Materials and products
2.19.5 Installation
2.20 PROVISION OF BACKFLOW PREVENTION DEVICES
2.20.1 General
2.20.2 Cross-connection hazard rating
2.20.3 Type of backflow protection
2.20.4 Registered break tanks and registered air gaps
2.21 BIDET, BIDETTE AND TOILET SEAT DOUCHE
2.21.1 Bidet
2.21.2 Bidette
2.21.3 Toilet seat douche
2.22 WATER CLOSET FLUSHING VOLUMES
2.22.1 Flushing volumes
2.22.2 Performance compatibility of cisterns and pans
2.23 IRRIGATION AND LAWN WATERING
2.23.1 System types
2.23.2 Type B system
2.24 TESTING AND COMMISSIONING
2.24.1 General
2.24.2 Flushing
2.24.3 Testing
2.25 DISINFECTION
2.25.1 Disinfection of water services
2.25.2 Disinfection of drinking water storage tanks
2.26 COMMISSIONING
SECTION 3 HEATED WATER SERVICES
3.1 SCOPE AND GENERAL
3.1.1 Scope
3.1.2 Water quality
3.1.3 Equivalent pipe sizes
3.2 WATER TEMPERATURE
3.2.1 Storage temperature
3.2.2 Delivery temperature at sanitary fixtures
3.2.3 Acceptable solutions for control of delivery temperatures
3.3 LIMITATIONS ON THE USE OF PIPES AND FITTINGS
3.3.1 General
3.3.2 Plastics pipes and fittings
3.3.3 Metallic pipes and fittings
3.4 SAFE TRAY AND SAFE WASTE MATERIALS
3.4.1 Safe tray
3.4.2 Safe wastes
3.5 JOINTING MATERIALS
3.6 CROSS-CONNECTION CONTROL AND BACKFLOW PREVENTION
3.7 THERMOSTATIC MIXING VALVES
3.8 HEATED WATER PIPING-PROXIMITY TO OTHER SERVICES
3.9 HEATED WATER PIPEWORK-LOCATION AND PROTECTION
3.10 HEATED WATER PIPEWORK-METHODS OF JOINTING
3.11 HEATED WATER PIPING-SUPPORT AND FIXING ABOVE THE GROUND
3.12 INSTALLATION OF HEATED WATER SERVICES
3.12.1 Design and installation
3.12.2 Provision for expansion
3.12.3 Maximum rise of heated water supply pipes
3.12.4 Terminal fittings
3.12.5 Recirculation of cold water
3.13 WATER HEATER INSTALLATION
3.13.1 Water heaters
3.13.2 Selection of anode
3.13.3 Working pressure
3.13.4 Auxiliary controls
3.14 LOCATION OF WATER HEATERS
3.14.1 Placement
3.14.2 Accessibility and clearances
3.14.3 Ventilation and fluing
3.15 PROTECTION AGAINST DAMAGE FROM LEAKING WATER
3.15.1 Concealed water storage tanks
3.15.2 Unconcealed water storage tanks
3.15.3 Safe tray construction
3.15.4 Safe wastes
3.15.5 Placement of water heater or cold water storage tank on a safe tray
3.16 SUPPORT
3.16.1 Support of water storage tanks installed in a roof space
3.16.2 Support of water heaters or water storage tanks installed above a roof
3.16.3 Support of water heaters or water storage tanks installed other than in a roof space or above a roof
3.16.4 Seismic restraints
3.17 CORROSION PREVENTION AND WEATHER PROTECTION
3.17.1 Water heater base-Corrosion avoidance
3.17.2 Weather protection of externally installed water heaters
3.18 CONNECTIONS TO WATER HEATERS
3.19 PRESSURE RELIEF AND VENTING OF WATER HEATERS AND CONTAINERS
3.20 VALVES
3.20.1 General
3.20.2 Required set pressure of valves (for unvented water heaters)
3.20.3 Installation of valves
3.21 TEMPERATURE-PRESSURE-RELIEF VALVE AND EXPANSION CONTROL (EC) VALVE DRAIN LINES
3.21.1 Size and material
3.21.2 Interconnection of drain lines for individual water heaters
3.21.3 Installation
3.21.4 Tundish drain lines
3.21.5 Areas subject to freezing
3.22 VENT PIPES
3.22.1 Installation
3.22.2 Termination of vent pipe
3.22.3 Cold water storage-tank-fed water heaters (other than side-fed types)
3.22.4 Vented storage water heaters, inlet pressure-controlled
3.23 SOLAR WATER HEATERS
3.23.1 General
3.23.2 Performance
3.23.3 Solar water heater
3.23.4 Location
3.23.5 Sizing
3.24 INSTALLATION OF SOLAR WATER HEATER CONTAINER
3.24.1 General
3.24.2 Containers installed on or above a roof
3.24.3 Valves
3.24.4 Relief and expansion valve drain lines
3.24.5 Vent pipes
3.24.6 Supplementary heating connections
3.25 INSTALLATION OF COLLECTORS
3.25.1 Positioning
3.25.2 Mountings
3.25.3 Precautions
3.26 INSTALLATION OF CLOSE-COUPLED AND INTEGRAL SOLAR WATER HEATERS
3.26.1 General
3.26.2 Roof mountings and supports
3.27 THERMOSIPHON FLOW SOLAR WATER HEATERS WITH REMOTE CONTAINERS
3.27.1 General
3.27.2 Primary circuit flow and return pipes-Pipes and fittings
3.28 SOLAR WATER HEATERS WITH FORCED PRIMARY CIRCULATION
3.28.1 General
3.28.2 Primary circulation pump
3.29 SOLAR WATER HEATERS USED AS PREHEATERS
3.29.1 General
3.29.2 Installation of solar preheaters-Cold water storage tank-fed water heaters
3.29.3 Installation of solar preheaters-Mains pressure and reduced-pressure water heaters
3.30 SUPPLEMENTARY HEATING
3.30.1 Thermal capacity
3.30.2 Drain connection
3.31 CONTROLLED ENERGY SOURCES
3.32 WATER HEATERS WITH UNCONTROLLED ENERGY SOURCE
3.33 WATER AND ENERGY EFFICIENCY
3.33.1 General
3.33.2 Thermal insulation
3.33.3 Protection of insulation
3.33.4 Heat traps
3.33.5 Water efficiency
3.34 TESTING AND COMMISSIONING
3.34.1 Flushing
3.34.2 Testing
3.34.3 Commissioning
3.34.4 Operating instructions
SECTION 4 SANITARY PLUMBING AND DRAINAGE
4.1 SCOPE OF SECTION
4.2 MEASUREMENT OF PIPE LENGTH
4.3 PIPE GRADES
4.4 LIMITATIONS ON THE USE OF PIPES AND FITTINGS
4.4.1 General
4.4.2 Plastics pipes and fittings
4.4.3 Equivalent PE and PP pipe sizes
4.4.4 Vitrified clay pipes and fittings
4.4.5 Pipes and fittings for pressure applications
4.5 JOINTING
4.5.1 Solvent cement and priming fluid
4.5.2 Elastomeric seals
4.5.3 Methods of jointing of pipes
4.6 SUPPORT AND FIXINGS OF PIPEWORK
4.6.1 Brackets, clips and hangers
4.6.2 Prohibited supports
4.6.3 Holes in framework
4.7 LOCATION
4.8 FIXTURE UNIT RATINGS
4.9 SIZE AND LENGTH OF DRAINS
4.9.1 Fixture unit loading
4.9.2 Main drain
4.9.3 Branch drain
4.9.4 Limitations on vented DN 80 branch drain
4.9.5 Use of eccentric taper fittings
4.9.6 Size change
4.9.7 Oversizing of drain
4.10 LOCATION OF DRAINS
4.11 GRADES OF DRAINS
4.11.1 Minimum grade
4.11.2 Reduced grades
4.12 MULTI-UNIT DEVELOPMENTS (Multiple Class 1 buildings)
4.12.1 General
4.12.2 Methods of design
4.12.3 Discharge pipes
4.13 PROXIMITY TO OTHER SERVICES
4.14 DEPTH OF COVER
4.14.1 General
4.14.2 Minimum depth of cover
4.14.3 Drains installed with less than minimum cover
4.14.4 Drains under buildings
4.15 BUILDING OVER DRAINS
4.15.1 Alterations and additions to buildings
4.15.2 Drains in proximity to footings
4.16 POINT OF CONNECTION
4.16.1 General
4.16.2 Protection of sewers
4.16.3 Tidal or water-charged locations
4.17 LAYING OF DRAINS
4.17.1 General
4.17.2 Easements and watercourses
4.18 DRAINS
4.18.1 Below ground
4.18.2 Above ground, under buildings
4.19 INSPECTION SHAFTS AND BOUNDARY TRAPS
4.19.1 General
4.19.2 Inspection shafts and boundary trap risers
4.19.3 Installation of inspection shafts
4.19.4 Installation of boundary traps
4.20 REFLUX VALVES
4.20.1 Location
4.20.2 Installation
4.20.3 Surcharging sewer
4.20.4 Reflux valve chambers
4.21 INSPECTION OPENINGS FOR DRAINS
4.21.1 Location
4.21.2 Size
4.21.3 Types
4.21.4 Access to inspection openings
4.21.5 Sealing
4.22 TESTING AND INSPECTION OPENINGS FOR SANITARY PLUMBING
4.22.1 General requirements
4.22.2 Location of testing and inspection openings
4.22.3 Size of testing and inspection openings
4.22.4 Access to inspection openings
4.23 INSTALLATION OF PVC-U PIPES
4.24 INSTALLATION OF HIGH DENSITY POLYETHYLENE (PE-HD) PIPES
4.25 DISCONNECTION OF SANITARY PLUMBING
4.26 JUNCTIONS IN DRAINS
4.26.1 Drains installed at grade
4.26.2 Junctions installed other than on grade
4.26.3 Junctions installed in a vertical plane
4.26.4 Square junctions
4.26.5 Junctions for stacks connected to below-ground drainage
4.26.6 Jump-ups
4.27 DISCONNECTION AND SEALING
4.27.1 Disconnection from the sewer
4.27.2 Sealing
4.28 EXCAVATION OF TRENCHES
4.28.1 Trench dimensions
4.28.2 Over-excavation
4.28.3 Adjacent to the sewer
4.28.4 Water-charged ground
4.28.5 Shoring and underpinning buildings
4.29 CONCRETE SUPPORT FOR DRAINS
4.30 BEDDING OF DRAINS
4.30.1 General
4.30.2 Bedding materials
4.30.3 Pipe side support and overlay materials
4.31 INSTALLATION OF BACKFILL MATERIALS
4.31.1 General
4.31.2 Builder™s waste
4.31.3 Excavated material
4.32 COMMON EFFLUENT DRAINAGE SYSTEMS
4.32.1 General
4.32.2 Drainage connections
4.32.3 Septic tanks
4.32.4 On-site wastewater treatment units
4.32.5 Sullage tanks
4.33 RE-USE OF EXISTING DRAINS
4.34 VENTING OF DRAINS
4.34.1 General
4.34.2 Location
4.34.3 Size of drainage vents
4.34.4 Prohibited use
4.34.5 Minimum grade
4.34.6 Interconnections
4.34.7 Termination
4.34.8 Air admittance valves (AAVs)
4.35 UNVENTED BRANCH DRAINS
4.35.1 General
4.35.2 Sizing
4.35.3 Maximum length
4.35.4 Vertical sections
4.35.5 Connection of fixture discharge pipes
4.36 GULLIES
4.36.1 General
4.36.2 Installation
4.36.3 Maintenance of water seal
4.36.4 Prohibited discharge
4.36.5 Disconnector gullies inside buildings
4.36.6 Overflow relief gullies
4.36.7 Unvented drains discharging to gullies
4.36.8 Floor waste gullies
4.36.9 Untrapped floor drains
4.36.10 Charging floor waste gullies
4.36.11 Installation of charge pipes
4.37 INSTALLATION OF FIXTURES
4.37.1 General installation requirements
4.37.2 Trapping of fixtures and appliances
4.38 VACUUM SYSTEMS
4.39 PUMPED DISCHARGE
4.39.1 General
4.39.2 Wet wells
4.39.3 Installation of pumps
4.39.4 Pumped discharges or rising mains
4.40 PUMP DISCHARGE FROM WASTE FIXTURES
4.40.1 General
4.40.2 Holding tank
4.40.3 Provision of valves
4.40.4 Inlet
4.40.5 Outlet
4.40.6 Venting
4.40.7 Pump discharge pipe
4.41 SWIMMING POOL DISCHARGE
4.42 SMALL BORE MACERATOR PUMPS
4.43 ELECTRIC CONNECTION
4.44 STACKS AND DISCHARGE PIPES CONNECTING TO STACKS
4.44.1 Single stack design and installation
4.44.2 Fully vented modified system
4.44.3 General design requirements
4.45 INSTALLATION OF ABOVE-GROUND (ELEVATED) PIPEWORK AND CONNECTION OF FIXTURES USING DRAINAGE PRINCIPLES
4.45.1 General
4.45.2 Maximum length and size
4.45.3 Permitted installations
4.46 GREYWATER DRAINAGE SYSTEMS
4.46.1 General
4.46.2 Design
4.46.3 Material and products
4.46.4 Installation requirements
4.47 TESTING
4.47.1 General
4.47.2 Hydrostatic test (water test)
4.47.3 Air pressure test
4.47.4 Vacuum test
SECTION 5 STORMWATER DRAINAGE
5.1 SCOPE OF SECTION
5.2 DEFINITIONS
5.2.1 Average recurrence interval (ARI)
5.2.2 Box gutter
5.2.3 Eaves gutter
5.2.4 External stormwater drainage network
5.2.5 Freeboard
5.2.6 Inert catchment
5.2.7 Inlet pit
5.2.8 Network utility operator
5.2.9 On-grade pit
5.2.10 On-site stormwater detention (OSD) tank
5.2.11 Overflow device
5.2.12 Permanent ponding
5.2.13 Point of connection
5.2.14 Rainhead
5.2.15 Sag pit
5.2.16 Site stormwater drain or channel
5.2.17 Soaker
5.2.18 Spreader
5.2.19 Stormwater
5.2.20 Stormwater drainage system
5.2.21 Stormwater pit
5.2.22 Sump
5.2.23 Surcharge outlet
5.2.24 Surface drainage system
5.2.25 Valley gutters
5.3 NETWORK UTILITY OPERATOR REQUIREMENTS
5.3.1 Position and manner of discharge
5.3.2 Stormwater drainage plans
5.4 PRODUCTS AND MATERIALS
5.4.1 General
5.4.2 Roof drainage system
5.4.3 Surface water drains
5.4.4 Subsoil drains
5.4.5 Jointing materials
5.4.6 Concrete
5.4.7 Mortar
5.4.8 Trench fill
5.4.9 Cover and sump grates
5.4.10 Precast concrete or prefabricated pits
5.5 JOINTING SYSTEMS
5.5.1 Cement mortar (CM)
5.5.2 Elastomeric seals (ES)
5.5.3 Epoxy resin (ER)
5.5.4 Soft soldering (SS)
5.5.5 Sealant
5.5.6 Solvent cement (SC)
5.5.7 Threaded (TH)
5.5.8 Joints for PVC components
5.6 ROOF DRAINAGE SYSTEMS
5.6.1 General
5.6.2 Meteorological criteria
5.6.3 Catchment area
5.6.4 Eaves gutter systems
5.6.5 Valley gutters
5.6.6 Box gutters systems
5.6.7 Soakers
5.6.8 Spreaders
5.6.9 Roof drainage support systems
5.6.10 Thermal variation
5.6.11 Corrosion
5.6.12 Installation
5.6.13 Testing
5.6.14 Inspection and cleaning
5.6.15 Alterations and disconnections
5.7 SURFACE DRAINAGE SYSTEMS
5.7.1 Design methods
5.7.2 Layout
5.7.3 Pipe drains
5.7.4 Surcharge outlets
5.7.5 On-site stormwater detention (OSD) systems
5.7.6 Concentrated discharges to streets
5.7.7 Major storm checks
5.7.8 Snowfall effects
5.7.9 Products and joints
5.7.10 Protection of external stormwater drainage network
5.7.11 Installation
5.7.12 Re-use of materials
5.7.13 Paved surfaces
5.7.14 Reflux valves
5.7.15 Inspection openings
5.7.16 Stormwater pits and inlet pits
5.7.17 Disconnection
5.7.18 Testing
5.8 SUBSOIL SYSTEMS
5.8.1 Purpose
5.8.2 Investigation and design
5.8.3 Products and joints
5.8.4 Protection of works
5.8.5 Re-use of materials
5.9 TESTING
5.9.1 General
5.9.2 Downpipes and drains within or under buildings
5.9.3 Test criteria
5.9.4 Procedure
SECTION 6 RAINWATER SUPPLY
6.1 SCOPE
6.2 PIPES, VALVES AND FITTINGS
6.3 INSTALLATION
6.3.1 General
6.3.2 Additional marking and signage of pipework and outlets
6.3.3 Connection between service pipes
6.4 PROTECTION OF OTHER WATER SUPPLIES FROM RAINWATER
APPENDIX A - NORMATIVE REFERENCES
APPENDIX B - PIPES AND FITTINGS-HEATED WATER SERVICES
APPENDIX C - PIPES AND FITTINGS-SANITARY PLUMBING AND DRAINAGE
APPENDIX D - PIPES AND FITTINGS-WATER SERVICES
APPENDIX E - EQUIVALENT PIPE SIZES, PRESSURES AND CLASS
E1 EQUIVALENT PIPE SIZES
APPENDIX F - SIZING OF PIPING FOR DWELLINGS
F1 GENERAL
F2 PROCEDURE
F3 WORKED EXAMPLE
APPENDIX G - PROXIMITY TO OTHER SERVICES
G1 GENERAL
G2 WATER SERVICES
G3 HEATED WATER SYSTEMS
G4 SANITARY PLUMBING AND DRAINAGE
G5 STORMWATER DRAINAGE
G6 CLEARANCE FROM UNDERGROUND OBSTRUCTIONS
APPENDIX H - DISINFECTION OF WATER SERVICES
H1 GENERAL
H2 PRECAUTIONS AGAINST CONTAMINATION
H3 FLUSHING OF WATER SERVICES
H4 CHLORINATION
H5 FINAL FLUSHING
APPENDIX I - CLEANING AND DISINFECTION OF STORAGE TANKS
I1 GENERAL
I2 CLEANING
I3 DISINFECTION
APPENDIX J - AUSTRALIAN CLIMATE REGIONS
J1 SCOPE
J2 CLIMATE REGIONS
APPENDIX K - NEW ZEALAND CLIMATE REGIONS
K1 SCOPE
K2 CLIMATE REGIONS
APPENDIX L - STORMWATER DRAINAGE INSTALLATION PLANS
L1 SCOPE
L2 ROOF PLAN
L3 SITE PLAN
L4 CATCHMENT PLAN
APPENDIX M - GUIDANCE ON EAVES GUTTER DESIGN
M1 EFFECTIVE CROSS-SECTIONAL AREA OF EAVES GUTTERS
M2 NEED FOR LARGER PROFILE EAVES GUTTERS
M3 NUMBER OF DOWNPIPES
M4 MAXIMUM DESIGN FLOW
M5 SELECTED GRADIENT OF EAVES GUTTERS
APPENDIX N - WORKED EXAMPLES-EAVES GUTTER AND BOX GUTTER DESIGN
N1 EAVES GUTTER-WORKED EXAMPLE
N1.1 Problem
N1.2 Solution
N2 EAVES GUTTERS-DESIGN EXERCISE
N2.1 Problem
N2.2 Solution to design exercise for eaves gutters
N3 BOX GUTTER-WORKED EXAMPLE
N3.1 Problem
N3.2 Solution
N4 SURFACE DRAINAGE-WORKED EXAMPLE
N4.1 Problem
N4.2 Solution
APPENDIX O - RAINFALL INTENSITIES FOR AUSTRALIA AND NEW ZEALAND
O1 AUSTRALIA
O2 New Zealand
O3 SELECTED PLACE REFERENCES IN AUSTRALIA
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References
Plastics piping systems for soil and waste discharge (low and high temperature) inside buildings - Polyethylene (PE)
Air admittance valves (AAVs) for use in sanitary plumbing and drainage systems
PVC-U maintenance shafts
Plastics piping systems for soil and waste discharge (low and high temperature) inside buildings - Polypropylene (PP)
Installation of domestic solar water heating systems
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AS/NZS 3500.5:2012 PLUMBING AND DRAINAGE - HOUSING INSTALLATIONS
PREFACE
CONTENTS
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE
1.2 NORMATIVE REFERENCES
1.3 DEFINITIONS
1.4 APPLICATION
1.4.1 National Construction Code Volume 3-Plumbing Code of Australia
1.4.2 National Construction Code (NCC)
1.4.3 New Zealand Building Code
1.4.4 Classes of buildings
1.5 AUTHORIZATION
1.6 SELECTION AND USE OF MATERIALS AND PRODUCTS
1.7 TERMITE MANAGEMENT
1.8 PLUMBING AND DRAINAGE INSTALLATIONS IN FILLED, UNSTABLE, EXPANSIVE, WATER-CHARGED OR REACTIVE GROUND
1.9 ELECTRICAL SAFETY PRECAUTIONS AND EARTHING
1.10 FACILITIES FOR PEOPLE WITH DISABILITIES
1.11 STRUCTURAL CONCRETE OR BRICKWORK
1.12 ALTERNATIVE DESIGNS AND METHODS OF INSTALLATION
SECTION 2 WATER SERVICES
2.1 SCOPE
2.2 EQUIVALENT PIPE SIZES
2.3 LIMITATIONS ON THE USE OF PIPES AND FITTINGS
2.3.1 General
2.3.2 Plastics pipes and fittings
2.3.3 Metallic pipes and fittings
2.4 METHODS OF JOINTING
2.4.1 General
2.4.2 Threading
2.4.3 Capillary fitting
2.4.4 Compression joints
2.4.5 Silver brazing
2.4.6 Soft soldering
2.4.7 Solvent cement joints and priming fluid
2.5 PRESSURE AND FLOW RATE REQUIREMENTS OF WATER SERVICES
2.5.1 General
2.5.2 Available pressure
2.5.3 Minimum pressures and delivery flow rates
2.5.4 Availability of water supply
2.5.5 Velocity requirements
2.5.6 Pipe size limitations
2.5.7 Sizing of piping for dwellings
2.6 WATER METERS
2.6.1 General
2.6.2 Installation inside buildings
2.6.3 Installation below ground
2.6.4 Protection from mechanical damage
2.6.5 Frost protection
2.7 PROXIMITY TO OTHER SERVICES
2.8 ISOLATING VALVES
2.8.1 General
2.8.2 Location
2.8.3 Maintenance
2.8.4 Multiple dwellings
2.9 DEPTH OF COVER
2.9.1 General
2.9.2 Bedding and backfill
2.10 PROTECTION AGAINST FREEZING
2.10.1 Requirement for protection
2.10.2 Piping located outside buildings
2.10.3 Pipes located on metal roofs
2.10.4 Pipes located inside buildings
2.10.5 Insulation of piping
2.11 BUSHFIRE ZONES
2.12 CORROSIVE AREAS
2.12.1 General
2.12.2 Jointing of dissimilar metallic pipes and fittings
2.13 LOCATION OF PIPING
2.13.1 Location
2.13.2 Concealed piping
2.13.3 Chases, ducts or conduits
2.13.4 Under concrete slabs
2.14 SUPPORT AND FIXING OF PIPES-ABOVE THE GROUND
2.14.1 General
2.14.2 Brackets, clips and hangers
2.14.3 Prohibited supports
2.14.4 Spacing
2.14.5 Securing of pipes, fittings and valves
2.15 STANDPIPES
2.16 PROTECTION OF WATER SUPPLIES
2.16.1 Design
2.16.2 Quality of drinking water supply
2.16.3 Protection against contaminants
2.16.4 Alternative water supplies
2.17 NON-DRINKING WATER SERVICES
2.17.1 General
2.17.2 Cross-connection control
2.17.3 Material and products
2.17.4 Installation requirements
2.17.5 Non-drinking water services and outlets
2.18 TESTING AND COMMISSIONING A NON-DRINKING WATER SERVICE
2.19 TREATED GREYWATER SERVICES
2.19.1 General
2.19.2 Cross-connection control
2.19.3 Protection of other water supplies from treated greywater
2.19.4 Materials and products
2.19.5 Installation
2.20 PROVISION OF BACKFLOW PREVENTION DEVICES
2.20.1 General
2.20.2 Cross-connection hazard rating
2.20.3 Type of backflow protection
2.20.4 Registered break tanks and registered air gaps
2.21 BIDET, BIDETTE AND TOILET SEAT DOUCHE
2.21.1 Bidet
2.21.2 Bidette
2.21.3 Toilet seat douche
2.22 WATER CLOSET FLUSHING VOLUMES
2.22.1 Flushing volumes
2.22.2 Performance compatibility of cisterns and pans
2.23 IRRIGATION AND LAWN WATERING
2.23.1 System types
2.23.2 Type B system
2.24 TESTING AND COMMISSIONING
2.24.1 General
2.24.2 Flushing
2.24.3 Testing
2.25 DISINFECTION
2.25.1 Disinfection of water services
2.25.2 Disinfection of drinking water storage tanks
2.26 COMMISSIONING
SECTION 3 HEATED WATER SERVICES
3.1 SCOPE AND GENERAL
3.1.1 Scope
3.1.2 Water quality
3.1.3 Equivalent pipe sizes
3.2 WATER TEMPERATURE
3.2.1 Storage temperature
3.2.2 Delivery temperature at sanitary fixtures
3.2.3 Acceptable solutions for control of delivery temperatures
3.3 LIMITATIONS ON THE USE OF PIPES AND FITTINGS
3.3.1 General
3.3.2 Plastics pipes and fittings
3.3.3 Metallic pipes and fittings
3.4 SAFE TRAY AND SAFE WASTE MATERIALS
3.4.1 Safe tray
3.4.2 Safe wastes
3.5 JOINTING MATERIALS
3.6 CROSS-CONNECTION CONTROL AND BACKFLOW PREVENTION
3.7 THERMOSTATIC MIXING VALVES
3.8 HEATED WATER PIPING-PROXIMITY TO OTHER SERVICES
3.9 HEATED WATER PIPEWORK-LOCATION AND PROTECTION
3.10 HEATED WATER PIPEWORK-METHODS OF JOINTING
3.11 HEATED WATER PIPING-SUPPORT AND FIXING ABOVE THE GROUND
3.12 INSTALLATION OF HEATED WATER SERVICES
3.12.1 Design and installation
3.12.2 Provision for expansion
3.12.3 Maximum rise of heated water supply pipes
3.12.4 Terminal fittings
3.12.5 Recirculation of cold water
3.13 WATER HEATER INSTALLATION
3.13.1 Water heaters
3.13.2 Selection of anode
3.13.3 Working pressure
3.13.4 Auxiliary controls
3.14 LOCATION OF WATER HEATERS
3.14.1 Placement
3.14.2 Accessibility and clearances
3.14.3 Ventilation and fluing
3.15 PROTECTION AGAINST DAMAGE FROM LEAKING WATER
3.15.1 Concealed water storage tanks
3.15.2 Unconcealed water storage tanks
3.15.3 Safe tray construction
3.15.4 Safe wastes
3.15.5 Placement of water heater or cold water storage tank on a safe tray
3.16 SUPPORT
3.16.1 Support of water storage tanks installed in a roof space
3.16.2 Support of water heaters or water storage tanks installed above a roof
3.16.3 Support of water heaters or water storage tanks installed other than in a roof space or above a roof
3.16.4 Seismic restraints
3.17 CORROSION PREVENTION AND WEATHER PROTECTION
3.17.1 Water heater base-Corrosion avoidance
3.17.2 Weather protection of externally installed water heaters
3.18 CONNECTIONS TO WATER HEATERS
3.19 PRESSURE RELIEF AND VENTING OF WATER HEATERS AND CONTAINERS
3.20 VALVES
3.20.1 General
3.20.2 Required set pressure of valves (for unvented water heaters)
3.20.3 Installation of valves
3.21 TEMPERATURE-PRESSURE-RELIEF VALVE AND EXPANSION CONTROL (EC) VALVE DRAIN LINES
3.21.1 Size and material
3.21.2 Interconnection of drain lines for individual water heaters
3.21.3 Installation
3.21.4 Tundish drain lines
3.21.5 Areas subject to freezing
3.22 VENT PIPES
3.22.1 Installation
3.22.2 Termination of vent pipe
3.22.3 Cold water storage-tank-fed water heaters (other than side-fed types)
3.22.4 Vented storage water heaters, inlet pressure-controlled
3.23 SOLAR WATER HEATERS
3.23.1 General
3.23.2 Performance
3.23.3 Solar water heater
3.23.4 Location
3.23.5 Sizing
3.24 INSTALLATION OF SOLAR WATER HEATER CONTAINER
3.24.1 General
3.24.2 Containers installed on or above a roof
3.24.3 Valves
3.24.4 Relief and expansion valve drain lines
3.24.5 Vent pipes
3.24.6 Supplementary heating connections
3.25 INSTALLATION OF COLLECTORS
3.25.1 Positioning
3.25.2 Mountings
3.25.3 Precautions
3.26 INSTALLATION OF CLOSE-COUPLED AND INTEGRAL SOLAR WATER HEATERS
3.26.1 General
3.26.2 Roof mountings and supports
3.27 THERMOSIPHON FLOW SOLAR WATER HEATERS WITH REMOTE CONTAINERS
3.27.1 General
3.27.2 Primary circuit flow and return pipes-Pipes and fittings
3.28 SOLAR WATER HEATERS WITH FORCED PRIMARY CIRCULATION
3.28.1 General
3.28.2 Primary circulation pump
3.29 SOLAR WATER HEATERS USED AS PREHEATERS
3.29.1 General
3.29.2 Installation of solar preheaters-Cold water storage tank-fed water heaters
3.29.3 Installation of solar preheaters-Mains pressure and reduced-pressure water heaters
3.30 SUPPLEMENTARY HEATING
3.30.1 Thermal capacity
3.30.2 Drain connection
3.31 CONTROLLED ENERGY SOURCES
3.32 WATER HEATERS WITH UNCONTROLLED ENERGY SOURCE
3.33 WATER AND ENERGY EFFICIENCY
3.33.1 General
3.33.2 Thermal insulation
3.33.3 Protection of insulation
3.33.4 Heat traps
3.33.5 Water efficiency
3.34 TESTING AND COMMISSIONING
3.34.1 Flushing
3.34.2 Testing
3.34.3 Commissioning
3.34.4 Operating instructions
SECTION 4 SANITARY PLUMBING AND DRAINAGE
4.1 SCOPE OF SECTION
4.2 MEASUREMENT OF PIPE LENGTH
4.3 PIPE GRADES
4.4 LIMITATIONS ON THE USE OF PIPES AND FITTINGS
4.4.1 General
4.4.2 Plastics pipes and fittings
4.4.3 Equivalent PE and PP pipe sizes
4.4.4 Vitrified clay pipes and fittings
4.4.5 Pipes and fittings for pressure applications
4.5 JOINTING
4.5.1 Solvent cement and priming fluid
4.5.2 Elastomeric seals
4.5.3 Methods of jointing of pipes
4.6 SUPPORT AND FIXINGS OF PIPEWORK
4.6.1 Brackets, clips and hangers
4.6.2 Prohibited supports
4.6.3 Holes in framework
4.7 LOCATION
4.8 FIXTURE UNIT RATINGS
4.9 SIZE AND LENGTH OF DRAINS
4.9.1 Fixture unit loading
4.9.2 Main drain
4.9.3 Branch drain
4.9.4 Limitations on vented DN 80 branch drain
4.9.5 Use of eccentric taper fittings
4.9.6 Size change
4.9.7 Oversizing of drain
4.10 LOCATION OF DRAINS
4.11 GRADES OF DRAINS
4.11.1 Minimum grade
4.11.2 Reduced grades
4.12 MULTI-UNIT DEVELOPMENTS (Multiple Class 1 buildings)
4.12.1 General
4.12.2 Methods of design
4.12.3 Discharge pipes
4.13 PROXIMITY TO OTHER SERVICES
4.14 DEPTH OF COVER
4.14.1 General
4.14.2 Minimum depth of cover
4.14.3 Drains installed with less than minimum cover
4.14.4 Drains under buildings
4.15 BUILDING OVER DRAINS
4.15.1 Alterations and additions to buildings
4.15.2 Drains in proximity to footings
4.16 POINT OF CONNECTION
4.16.1 General
4.16.2 Protection of sewers
4.16.3 Tidal or water-charged locations
4.17 LAYING OF DRAINS
4.17.1 General
4.17.2 Easements and watercourses
4.18 DRAINS
4.18.1 Below ground
4.18.2 Above ground, under buildings
4.19 INSPECTION SHAFTS AND BOUNDARY TRAPS
4.19.1 General
4.19.2 Inspection shafts and boundary trap risers
4.19.3 Installation of inspection shafts
4.19.4 Installation of boundary traps
4.20 REFLUX VALVES
4.20.1 Location
4.20.2 Installation
4.20.3 Surcharging sewer
4.20.4 Reflux valve chambers
4.21 INSPECTION OPENINGS FOR DRAINS
4.21.1 Location
4.21.2 Size
4.21.3 Types
4.21.4 Access to inspection openings
4.21.5 Sealing
4.22 TESTING AND INSPECTION OPENINGS FOR SANITARY PLUMBING
4.22.1 General requirements
4.22.2 Location of testing and inspection openings
4.22.3 Size of testing and inspection openings
4.22.4 Access to inspection openings
4.23 INSTALLATION OF PVC-U PIPES
4.24 INSTALLATION OF HIGH DENSITY POLYETHYLENE (PE-HD) PIPES
4.25 DISCONNECTION OF SANITARY PLUMBING
4.26 JUNCTIONS IN DRAINS
4.26.1 Drains installed at grade
4.26.2 Junctions installed other than on grade
4.26.3 Junctions installed in a vertical plane
4.26.4 Square junctions
4.26.5 Junctions for stacks connected to below-ground drainage
4.26.6 Jump-ups
4.27 DISCONNECTION AND SEALING
4.27.1 Disconnection from the sewer
4.27.2 Sealing
4.28 EXCAVATION OF TRENCHES
4.28.1 Trench dimensions
4.28.2 Over-excavation
4.28.3 Adjacent to the sewer
4.28.4 Water-charged ground
4.28.5 Shoring and underpinning buildings
4.29 CONCRETE SUPPORT FOR DRAINS
4.30 BEDDING OF DRAINS
4.30.1 General
4.30.2 Bedding materials
4.30.3 Pipe side support and overlay materials
4.31 INSTALLATION OF BACKFILL MATERIALS
4.31.1 General
4.31.2 Builder™s waste
4.31.3 Excavated material
4.32 COMMON EFFLUENT DRAINAGE SYSTEMS
4.32.1 General
4.32.2 Drainage connections
4.32.3 Septic tanks
4.32.4 On-site wastewater treatment units
4.32.5 Sullage tanks
4.33 RE-USE OF EXISTING DRAINS
4.34 VENTING OF DRAINS
4.34.1 General
4.34.2 Location
4.34.3 Size of drainage vents
4.34.4 Prohibited use
4.34.5 Minimum grade
4.34.6 Interconnections
4.34.7 Termination
4.34.8 Air admittance valves (AAVs)
4.35 UNVENTED BRANCH DRAINS
4.35.1 General
4.35.2 Sizing
4.35.3 Maximum length
4.35.4 Vertical sections
4.35.5 Connection of fixture discharge pipes
4.36 GULLIES
4.36.1 General
4.36.2 Installation
4.36.3 Maintenance of water seal
4.36.4 Prohibited discharge
4.36.5 Disconnector gullies inside buildings
4.36.6 Overflow relief gullies
4.36.7 Unvented drains discharging to gullies
4.36.8 Floor waste gullies
4.36.9 Untrapped floor drains
4.36.10 Charging floor waste gullies
4.36.11 Installation of charge pipes
4.37 INSTALLATION OF FIXTURES
4.37.1 General installation requirements
4.37.2 Trapping of fixtures and appliances
4.38 VACUUM SYSTEMS
4.39 PUMPED DISCHARGE
4.39.1 General
4.39.2 Wet wells
4.39.3 Installation of pumps
4.39.4 Pumped discharges or rising mains
4.40 PUMP DISCHARGE FROM WASTE FIXTURES
4.40.1 General
4.40.2 Holding tank
4.40.3 Provision of valves
4.40.4 Inlet
4.40.5 Outlet
4.40.6 Venting
4.40.7 Pump discharge pipe
4.41 SWIMMING POOL DISCHARGE
4.42 SMALL BORE MACERATOR PUMPS
4.43 ELECTRIC CONNECTION
4.44 STACKS AND DISCHARGE PIPES CONNECTING TO STACKS
4.44.1 Single stack design and installation
4.44.2 Fully vented modified system
4.44.3 General design requirements
4.45 INSTALLATION OF ABOVE-GROUND (ELEVATED) PIPEWORK AND CONNECTION OF FIXTURES USING DRAINAGE PRINCIPLES
4.45.1 General
4.45.2 Maximum length and size
4.45.3 Permitted installations
4.46 GREYWATER DRAINAGE SYSTEMS
4.46.1 General
4.46.2 Design
4.46.3 Material and products
4.46.4 Installation requirements
4.47 TESTING
4.47.1 General
4.47.2 Hydrostatic test (water test)
4.47.3 Air pressure test
4.47.4 Vacuum test
SECTION 5 STORMWATER DRAINAGE
5.1 SCOPE OF SECTION
5.2 DEFINITIONS
5.2.1 Average recurrence interval (ARI)
5.2.2 Box gutter
5.2.3 Eaves gutter
5.2.4 External stormwater drainage network
5.2.5 Freeboard
5.2.6 Inert catchment
5.2.7 Inlet pit
5.2.8 Network utility operator
5.2.9 On-grade pit
5.2.10 On-site stormwater detention (OSD) tank
5.2.11 Overflow device
5.2.12 Permanent ponding
5.2.13 Point of connection
5.2.14 Rainhead
5.2.15 Sag pit
5.2.16 Site stormwater drain or channel
5.2.17 Soaker
5.2.18 Spreader
5.2.19 Stormwater
5.2.20 Stormwater drainage system
5.2.21 Stormwater pit
5.2.22 Sump
5.2.23 Surcharge outlet
5.2.24 Surface drainage system
5.2.25 Valley gutters
5.3 NETWORK UTILITY OPERATOR REQUIREMENTS
5.3.1 Position and manner of discharge
5.3.2 Stormwater drainage plans
5.4 PRODUCTS AND MATERIALS
5.4.1 General
5.4.2 Roof drainage system
5.4.3 Surface water drains
5.4.4 Subsoil drains
5.4.5 Jointing materials
5.4.6 Concrete
5.4.7 Mortar
5.4.8 Trench fill
5.4.9 Cover and sump grates
5.4.10 Precast concrete or prefabricated pits
5.5 JOINTING SYSTEMS
5.5.1 Cement mortar (CM)
5.5.2 Elastomeric seals (ES)
5.5.3 Epoxy resin (ER)
5.5.4 Soft soldering (SS)
5.5.5 Sealant
5.5.6 Solvent cement (SC)
5.5.7 Threaded (TH)
5.5.8 Joints for PVC components
5.6 ROOF DRAINAGE SYSTEMS
5.6.1 General
5.6.2 Meteorological criteria
5.6.3 Catchment area
5.6.4 Eaves gutter systems
5.6.5 Valley gutters
5.6.6 Box gutters systems
5.6.7 Soakers
5.6.8 Spreaders
5.6.9 Roof drainage support systems
5.6.10 Thermal variation
5.6.11 Corrosion
5.6.12 Installation
5.6.13 Testing
5.6.14 Inspection and cleaning
5.6.15 Alterations and disconnections
5.7 SURFACE DRAINAGE SYSTEMS
5.7.1 Design methods
5.7.2 Layout
5.7.3 Pipe drains
5.7.4 Surcharge outlets
5.7.5 On-site stormwater detention (OSD) systems
5.7.6 Concentrated discharges to streets
5.7.7 Major storm checks
5.7.8 Snowfall effects
5.7.9 Products and joints
5.7.10 Protection of external stormwater drainage network
5.7.11 Installation
5.7.12 Re-use of materials
5.7.13 Paved surfaces
5.7.14 Reflux valves
5.7.15 Inspection openings
5.7.16 Stormwater pits and inlet pits
5.7.17 Disconnection
5.7.18 Testing
5.8 SUBSOIL SYSTEMS
5.8.1 Purpose
5.8.2 Investigation and design
5.8.3 Products and joints
5.8.4 Protection of works
5.8.5 Re-use of materials
5.9 TESTING
5.9.1 General
5.9.2 Downpipes and drains within or under buildings
5.9.3 Test criteria
5.9.4 Procedure
SECTION 6 RAINWATER SUPPLY
6.1 SCOPE
6.2 PIPES, VALVES AND FITTINGS
6.3 INSTALLATION
6.3.1 General
6.3.2 Additional marking and signage of pipework and outlets
6.3.3 Connection between service pipes
6.4 PROTECTION OF OTHER WATER SUPPLIES FROM RAINWATER
APPENDIX A - NORMATIVE REFERENCES
APPENDIX B - PIPES AND FITTINGS-HEATED WATER SERVICES
APPENDIX C - PIPES AND FITTINGS-SANITARY PLUMBING AND DRAINAGE
APPENDIX D - PIPES AND FITTINGS-WATER SERVICES
APPENDIX E - EQUIVALENT PIPE SIZES, PRESSURES AND CLASS
E1 EQUIVALENT PIPE SIZES
APPENDIX F - SIZING OF PIPING FOR DWELLINGS
F1 GENERAL
F2 PROCEDURE
F3 WORKED EXAMPLE
APPENDIX G - PROXIMITY TO OTHER SERVICES
G1 GENERAL
G2 WATER SERVICES
G3 HEATED WATER SYSTEMS
G4 SANITARY PLUMBING AND DRAINAGE
G5 STORMWATER DRAINAGE
G6 CLEARANCE FROM UNDERGROUND OBSTRUCTIONS
APPENDIX H - DISINFECTION OF WATER SERVICES
H1 GENERAL
H2 PRECAUTIONS AGAINST CONTAMINATION
H3 FLUSHING OF WATER SERVICES
H4 CHLORINATION
H5 FINAL FLUSHING
APPENDIX I - CLEANING AND DISINFECTION OF STORAGE TANKS
I1 GENERAL
I2 CLEANING
I3 DISINFECTION
APPENDIX J - AUSTRALIAN CLIMATE REGIONS
J1 SCOPE
J2 CLIMATE REGIONS
APPENDIX K - NEW ZEALAND CLIMATE REGIONS
K1 SCOPE
K2 CLIMATE REGIONS
APPENDIX L - STORMWATER DRAINAGE INSTALLATION PLANS
L1 SCOPE
L2 ROOF PLAN
L3 SITE PLAN
L4 CATCHMENT PLAN
APPENDIX M - GUIDANCE ON EAVES GUTTER DESIGN
M1 EFFECTIVE CROSS-SECTIONAL AREA OF EAVES GUTTERS
M2 NEED FOR LARGER PROFILE EAVES GUTTERS
M3 NUMBER OF DOWNPIPES
M4 MAXIMUM DESIGN FLOW
M5 SELECTED GRADIENT OF EAVES GUTTERS
APPENDIX N - WORKED EXAMPLES-EAVES GUTTER AND BOX GUTTER DESIGN
N1 EAVES GUTTER-WORKED EXAMPLE
N1.1 Problem
N1.2 Solution
N2 EAVES GUTTERS-DESIGN EXERCISE
N2.1 Problem
N2.2 Solution to design exercise for eaves gutters
N3 BOX GUTTER-WORKED EXAMPLE
N3.1 Problem
N3.2 Solution
N4 SURFACE DRAINAGE-WORKED EXAMPLE
N4.1 Problem
N4.2 Solution
APPENDIX O - RAINFALL INTENSITIES FOR AUSTRALIA AND NEW ZEALAND
O1 AUSTRALIA
O2 New Zealand
O3 SELECTED PLACE REFERENCES IN AUSTRALIA
Previous versions
AS/NZS 3500.5:2012
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