AS/NZS 3500.1.2:1998

1 - AS/NZS 3500.1.2:1998 NATIONAL PLUMBING AND DRAINAGE - WATER SUPPLY-ACCEPTABLE SOLUTIONS
4 - PREFACE
5 - CONTENTS
8 - FOREWORD
9 - SECTION 1 SCOPE AND GENERAL
9 - 1.1 SCOPE
9 - 1.2 REFERENCED DOCUMENTS
9 - 1.3 DEFINITIONS
9 - 1.3.1 Deemed to satisfy
9 - 1.3.2 Registered break tank
9 - 1.4 CLASSIFICATION OF SOILS
9 - 1.5 EQUIVALENT PIPE SIZES
9 - 1.6 REQUIREMENTS FOR DISABLED PERSONS
12 - SECTION 2 MATERIALS AND PRODUCTS
12 - 2.1 SCOPE OF SECTION
12 - 2.2 AUTHORIZATION
12 - 2.3 SELECTION AND USE OF MATERIALS
12 - 2.4 LIMITS ON USE OF PIPES AND FITTINGS
12 - 2.4.1 Acrylonitrile butadiene styrene (ABS)
12 - 2.4.2 Black steel pipes and fittings
12 - 2.4.3 Cast iron fittings (grey cast iron)
13 - 2.4.4 Copper
13 - 2.4.5 Copper alloy
13 - 2.4.6 Ductile iron
13 - 2.4.7 Galvanized steel
14 - 2.4.8 Polybutylene (PB)
14 - 2.4.9 Polyethylene (PE)
14 - 2.4.10 Cross-linked polyethylene (PE-X)
14 - 2.4.11 Polypropylene (PP-R)
15 - 2.4.12 Unplasticized polyvinyl chloride (UPVC)
15 - 2.4.13 Chlorinated polyvinyl chloride (CPVC)
15 - 2.4.14 Stainless steel
16 - 2.5 STORAGE TANK MATERIALS
16 - 2.6 JOINTING
16 - 2.6.1 Elastomeric rings
17 - 2.6.2 Elastomeric gaskets
17 - 2.6.3 Silver brazing alloy
17 - 2.6.4 Soft solders
17 - 2.6.5 Rolled grooved joints
17 - 2.7 CONCRETE AND MORTAR
17 - 2.7.1 Cement
17 - 2.7.2 Fine aggregate (sand)
17 - 2.7.3 Coarse aggregate (metal)
17 - 2.7.4 Concrete mix
17 - 2.7.5 Cement mortar
17 - 2.7.6 Chemical admixtures
17 - 2.7.7 Water for concrete and mortar
17 - 2.7.8 Steel reinforcement
18 - 2.8 MISCELLANEOUS MATERIALS
18 - 2.8.1 Timber
18 - 2.8.2 Thermal insulation
18 - 2.8.3 External protective coatings
18 - 2.9 SAFE TRAY AND SAFE WASTE MATERIALS
18 - 2.9.1 Safe tray
18 - 2.9.2 Safe wastes
18 - 2.10 BACKFLOW PREVENTION DEVICES
19 - SECTION 3 SiZING OF WATER SERVICES
19 - 3.1 SCOPE OF SECTION
19 - 3.2 FLOW REQUIREMENTS
19 - 3.2.1 Water flow rates at outlets
19 - 3.2.2 Loading units
19 - 3.2.3 Probable simultaneous demand
19 - 3.2.4 Probable simultaneous flow rate
19 - 3.3 PRESSURE REQUIREMENTS
19 - 3.3.1 Available pressure
20 - 3.3.2 Pressure at outlets
20 - 3.3.3 Head losses
20 - 3.4 VELOCITY REQUIREMENTS
20 - 3.5 PIPE SIZE LIMITATIONS
20 - 3.5.1 Water service
20 - 3.5.2 Branch offtakes
23 - SECTION 4 CROSS-CONNECTION CONTROL AND BACKFLOW PREVENTION
23 - 4.1 SCOPE OF SECTION
23 - 4.2 PROTECTION OF POTABLE WATER SUPPLIES
23 - 4.2.1 Design
23 - 4.2.2 Quality of water supply
23 - 4.2.3 Introduction of contaminants
23 - 4.2.4 Combined tanks serving flush valves (other than directly connected)
23 - 4.2.5 Alternative water supplies
24 - 4.2.6 Authorized fixtures, appliances or apparatus
24 - 4.3 CROSS-CONNECTION HAZARD RATING
24 - 4.4 PROVISION OF BACKFLOW PREVENTION DEVICES
24 - 4.4.1 General
24 - 4.4.2 Type of backflow protection
24 - 4.4.3 Hose taps
24 - 4.4.4 Additional backflow protection
24 - 4.4.5 Water downstream of backflow prevention device
25 - 4.4.6 Inspection and maintenance
25 - 4.4.7 Hot water systems
25 - 4.5 SUITABILITY OF DEVICES FOR HAZARDS
28 - 4.6 INSTALLATION OF BACKFLOW PREVENTION DEVICES
28 - 4.6.1 General installation requirements
28 - 4.6.2 Location of devices
29 - 4.6.3 Specific installation requirements for testable and non- testable devices
32 - SECTION 5 INSTALLATION OF COLD WATER SERVICES
32 - 5.1 SCOPE OF SECTION
32 - 5.2 ELECTRICAL SAFETY PRECAUTIONS EARTHING
32 - 5.3 PROXIMITY TO OTHER SERVICES
32 - 5.3.1 Electrical cables and gaspipes
32 - 5.3.2 Drains
33 - 5.4 ISOLATING VALVES
33 - 5.4.1 General
33 - 5.4.2 Maintenance
33 - 5.5 LOCATION AND ACCESS WITHIN AND UNDER BUILDINGS
33 - 5.5.1 Location
34 - 5.5.2 Concealed piping
35 - 5.6 METHODS OF JOINTING
35 - 5.6.1 General
36 - 5.6.2 Threading
36 - 5.6.3 Bolted-gland and gibault type joints
36 - 5.6.4 Non-metallic friction locked joints
36 - 5.6.5 Compression joints
36 - 5.6.6 Capillary fittings
36 - 5.6.7 Flanged joints
36 - 5.6.8 Elastomeric ring joints
36 - 5.6.9 Shouldered or grooved joints
37 - 5.6.10 Silver brazing
37 - 5.6.11 Soft soldering
37 - 5.6.12 Solvent cement joints
37 - 5.6.13 Jointing of stainless steel pipe and fittings
37 - 5.7 SUPPORT AND FIXING ABOVE GROUND
37 - 5.7.1 General
37 - 5.7.2 Brackets, clips and hangers
38 - 5.7.3 Prohibited supports
38 - 5.7.4 Spacing
39 - 5.8 STANDPIPES
39 - 5.9 ANCHORAGE BELOW GROUND
39 - 5.9.1 General
39 - 5.9.2 Location of thrust blocks (see Figure 5.2)
39 - 5.9.3 Construction of thrust blocks
39 - 5.9.4 Curing time for thrust blocks
39 - 5.10 DEPTH OF COVER IN PUBLIC AREAS
39 - 5.11 DEPTH OF COVER IN PRIVATE AREAS
41 - 5.12 BEDDING AND BACKFILL
42 - 5.13 CONTAMINATED AREAS
42 - 5.13.1 General
42 - 5.13.2 Installation
42 - 5.14 CORROSIVE AREAS
42 - 5.14.1 General
42 - 5.14.2 Galvanic corrosion
42 - 5.15 WATER- CHARGED OR FILLED GROUND
42 - 5.16 OPEN CHANNELS OR WATERCOURSES
42 - 5.17 PRIVATE EASEMENTS
42 - 5.17.1 Proximity of water services
42 - 5.17.2 Depth of piping
42 - 5.18 DRY SERVICES
43 - 5.19 FROST PROTECTION
43 - 5.19.1 Requirement for protection
43 - 5.19.2 Piping located outside buildings
43 - 5.19.3 Pipes located on metal roofs
43 - 5.19.4 Pipes located inside buildings
43 - 5.19.5 Insulation of piping
44 - 5.20 GENERAL PRECAUTIONS FOR PLASTICS PIPES AND FITTINGS
44 - 5.21 IDENTIFICATION
44 - 5.22 THERMOSTATIC MIXING VALVES
45 - SECTION 6 FIRE SERVICES
45 - 6.1 SCOPE OF SECTION
45 - 6.2 GENERAL
45 - 6.3 MATERIALS AND PRODUCTS
45 - 6.4 INSTALLATION
45 - 6.5 WATER SUPPLY TO A FIRE HYDRANT OR SPRINKLER SERVICE
45 - 6.6 FIRE HYDRANTS
45 - 6.6.1 General
45 - 6.6.2 Fabrication of steel fittings
45 - 6.7 HOSE REELS
45 - 6.8 FIRE SPRINKLER SERVICES
45 - 6.8.1 General
45 - 6.8.2 Sprinkler valve assembly
45 - 6.9 WINDOW OR WALL DRENCHER SPRINKLER SYSTEM
46 - 6.10 WATER STORAGE TANKS
46 - 6.11 PRESSURE REDUCTION
46 - 6.12 PUMPS
46 - 6.13 IDENTIFICATION
47 - SECTION 7 IRRIGATION AND LAWN-WATERING SYSTEMS
47 - 7.1 SCOPE OF SECTION
47 - 7.2 SYSTEM TYPES
47 - 7.3 BACKFLOW PROTECTION REQUIREMENTS
47 - 7.4 MATERIALS
53 - SECTION 8 WATER STORAGE TANKS
53 - 8.1 SCOPE OF SECTION
53 - 8.2 PURPOSE OF TANKS
53 - 8.2.1 General
53 - 8.2.2 Limitations on use
53 - 8.3 TANK MATERIALS
53 - 8.3.1 Permitted materials
53 - 8.3.2 Prohibited materials
53 - 8.4 INSTALLATION
53 - 8.4.1 General
54 - 8.4.2 Access
54 - 8.4.3 Internal corrosion protection
54 - 8.4.4 Location
54 - 8.5 TANK DESIGN
54 - 8.5.1 General
55 - 8.5.2 Tank cover
55 - 8.5.3 Safe-tray
55 - 8.5.4 Placement of tank
55 - 8.5.5 Size of air gap
55 - 8.5.6 Tank overflow
59 - 8.6 CAPACITY OF STORAGE TANKS
59 - 8.6.1 Measurement of capacity
60 - 8.6.2 Contingency reserve
60 - 8.7 INLET PIPING
60 - 8.7.1 Connections
60 - 8.7.2 Stop valve
60 - 8.8 OUTLET PIPING
60 - 8.8.1 Connections
60 - 8.8.2 Service outlets
60 - 8.9 SLUDGE VALVES
60 - 8.10 FIRE SERVICES TANKS
60 - 8.11 MARKING OF TANKS
61 - SECTION 9 WATER FOR SANITARY FLUSHING
61 - 9.1 SCOPE OF SECTION
61 - 9.2 GENERAL
61 - 9.3 FLUSHING REQUIREMENTS
61 - 9.4 URINALS
61 - 9.4.1 Quantity of flushing water
62 - 9.4.2 Automatic cisterns
62 - 9.4.3 Programmed flushing systems
62 - 9.4.4 Flushing devices operated on demand
62 - 9.4.5 Location of flush valves
62 - 9.5 INSTALLATION OF CISTERNS
62 - 9.5.1 General
62 - 9.5.2 Urinal type cisterns
62 - 9.5.3 Manually operated cisterns
62 - 9.5.4 Water closet pan and slop hopper pan type cisterns
62 - 9.6 FLUSH VALVES SUPPLIED FROM BREAK TANKS
62 - 9.6.1 General
62 - 9.6.2 Capacity
62 - 9.6.3 Operating head
62 - 9.6.4 Urinal type flush valves
63 - 9.7 FLUSH PIPES AND WATER FLOW DISTRIBUTION
63 - 9.8 PRESSURE RATIO VALVES
63 - 9.8.1 General
63 - 9.8.2 Requirement for pressure gauges
64 - 9.9 FLUSH VALVES CONNECTED TO THE POTABLE WATER SERVICE
64 - 9.9.1 General
64 - 9.9.2 Compatibility
64 - 9.9.3 Pipe size
64 - 9.9.4 Protection
64 - 9.9.5 Location
64 - 9.9.6 Pressure and velocity limitations
64 - 9.9.7 Branch service pipe
66 - SECTION 10 PUMPS
66 - 10.1 SCOPE OF SECTION
66 - 10.2 GENERAL
66 - 10.3 CONTROL OF PUMPS
66 - 10.4 INSTALLATION OF PUMPS
66 - 10.5 BOOSTER PUMPS
67 - SECTION 11 WATER REQUIREMENTS FOR HAEMODIALYSIS MACHINES
67 - 11.1 SCOPE OF SECTION
67 - 11.2 CONNECTION TO THE WATER SERVICE
67 - 11.3 MAINTENANCE OF FLOW RATE
67 - 11.4 WATER METER IDENTIFICATION
68 - SECTION 12 INSTALLATION OF WATER METERS
68 - 12.1 SCOPE OF SECTION
68 - 12.2 LOCATION OF WATER METERS
68 - 12.3 INSTALLATION OF WATER METERS
68 - 12.3.1 General
68 - 12.3.2 Inside buildings
68 - 12.3.3 Below ground
68 - 12.4 PROTECTION
68 - 12.5 ELECTRICAL SAFETY PRECAUTIONS
68 - 12.6 SUPPORT
68 - 12.7 FROST PROTECTION
69 - SECTION 13 TESTING AND COMMISSIONING
69 - 13.1 SCOPE OF SECTION
69 - 13.2 TESTING
69 - 13.2.1 Hydrostatic test
69 - 13.2.2 Storage tanks
69 - 13.3 CLEANING AND DISINFECTION OF STORAGE TANKS
69 - 13.4 DISINFECTION OF WATER SERVICES
69 - 13.5 COMMISSIONING
70 - APPENDIX A - REFERENCED DOCUMENTS
73 - APPENDIX B - SIZING METHOD FOR SUPPLY PIPING FOR DWELLINGS
73 - B1 GENERAL
73 - B2 PROCEDURE
80 - APPENDIX C - SIZING OF PIPING FOR DWELLINGS
80 - C1 GENERAL
80 - C2 PROCEDURE
81 - C3 EXAMPLE
83 - APPENXIX D - EXAMPLES OF POTENTIAL CROSS- CONNECTIONS
83 - D1 SCOPE
83 - D2 POTENTIAL CROSS- CONNECTIONS
85 - APPENDIX E - TYPES OF BACKFLOW PROTECTION
85 - E1 GENERAL
94 - APPENDIX F - STORAGE TANKS-INFLOW AND OVERFLOW
94 - F1 GENERAL
94 - F2 INFLOW RATE
94 - F3 OVERFLOW SIZE AND SPILLING LEVEL
94 - F4 AIR GAP
94 - F5 HEIGHT OF INLET ABOVE INVERT LEVEL OF OVERFLOW
96 - APPENDIX G - CLEANING AND DISINFECTION OF STORAGE TANKS
96 - G1 GENERAL
96 - G2 CLEANING
96 - G3 DISINFECTION
97 - APPENDIX H - DISINFECTION OF WATER SERVICES
97 - H1 GENERAL
97 - H2 PRECAUTIONS AGAINST CONTAMINATION
97 - H3 FLUSHING OF WATER SERVICES
97 - H4 CHLORINATION
97 - H5 FINAL FLUSHING
99 - AMENDMENT CONTROL SHEET

Specifies the requirements for the installation of water services from the authority's water main or alternative portable water supplies to the points of discharge. The standard applies to new installations as well as alterations, additions and repairs to existing installations.

This Standard sets out the requirements for the installation of water services from the authority's water main or alternative potable water supplies to the points of discharge. This Standard applies to new installations as well as alterations, additions and repairs to existing installations.Illustrations used in this Standard are diagrammatic only and have been chosen without prejudice.Construction of a water supply installation in accordance with this Standard is deemed to satisfy the requirements of AS 3500.1.1 for Australia. This Standard may be used as an alternative acceptable solution to Clause G12 of the New Zealand Building Code but may exceed the performance requirements.NOTE: The requirements for hot water services are set out in AS/NZS 3500.4.2

Originated in Australia as AS 3500.1-1990.
Final Australian edition AS 3500.1-1992.
Jointly revised and redesignated as AS/NZS 3500.1.2:1998.
Reissued incorporating Amendment No. 1 (August 2002)