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    AS 3688-2005

    AvailableSuperseded An Available Superseded Standard is one, which has been made available for a period of time although it has been formally superseded by another Standard. Its availability is maintained where it is referenced in legislation/regulations or in other Standards and its use should be restricted to where so referenced. No responsibility is taken by SAI Global as to the ongoing technical validity of such a Standard, the responsibility resting with the referencing authority.

    Water supply - Metallic fittings and end connectors

    Available format(s):  Hardcopy, PDF 1 User, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s): 

    Published date:  04-08-2005

    Publisher:  Standards Australia

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    Table of Contents - (Show below) - (Hide below)

    1 - AS 3688-2005 WATER SUPPLY-METALLIC FITTINGS AND END CONNECTORS
    4 - PREFACE
    5 - CONTENTS
    7 - SECTION 1 SCOPE AND GENERAL
    7 - 1.1 SCOPE
    7 - 1.2 APPLICATION
    7 - 1.3 REFERENCED DOCUMENTS
    8 - 1.4 DEFINITIONS
    8 - 1.4.1 Fabricated joint or fitting
    8 - 1.4.2 Fastening pipe thread
    8 - 1.4.3 Sealing pipe thread
    8 - 1.4.4 Threaded-end connector
    8 - 1.4.5 Union end connector
    8 - 1.5 DESIGNATION OF SIZE
    8 - 1.6 MARKING
    8 - 1.6.1 Space for mark of certifying body
    8 - 1.6.2 Components
    8 - 1.6.3 Marking requirements
    9 - 1.7 PRODUCT DOCUMENTATION
    9 - 1.7.1 Product data
    10 - SECTION 2 MATERIALS
    10 - 2.1 SCOPE OF SECTION
    10 - 2.2 MATERIALS IN CONTACT WITH DRINKING WATER
    10 - 2.3 METALLIC MATERIALS
    10 - 2.3.1 CORROSION-RESISTANT METALLIC MATERIALS
    10 - 2.3.2 COPPER
    10 - 2.3.3 COPPER ALLOY
    10 - 2.3.4 DEZINCIFICATION-RESISTANT (DR) COPPER ALLOY
    10 - 2.3.5 STAINLESS STEEL
    11 - 2.4 PLASTIC COMPONENT MATERIALS
    11 - 2.4.1 General
    11 - 2.4.2 Acetal
    11 - 2.4.3 'Not applicable'
    11 - 2.5 OTHER COMPONENT MATERIALS
    12 - SECTION 3 DESIGN AND DIMENSIONS
    12 - 3.1 SCOPE OF SECTION
    12 - 3.2 TUBE STOPS
    12 - 3.3 SLIP FITTINGS
    13 - 3.4 SPIGOTS
    13 - 3.5 FIXING DEVICE
    13 - 3.6 WATERWAYS
    13 - 3.6.1 Copper and copper alloy
    13 - 3.6.2 Stainless steel
    13 - 3.7 THICKNESS OF METAL PARTS OF FITTINGS SPECIFIED BY DIMENSION
    13 - 3.7.1 General
    13 - 3.7.2 Minimum thickness of unspecified metal parts
    15 - 3.8 SCREW THREADS
    15 - 3.8.1 Screw-threaded sealing connections
    15 - 3.8.2 Screw-threaded fastening connections
    15 - 3.8.3 Thread engagement-Assembled joints
    15 - 3.8.4 Other screw threads
    16 - 3.9 FABRICATED FITTINGS
    16 - 3.10 GEOMETRY OF FITTINGS
    16 - 3.11 PLATING AND OTHER SURFACE FINISHES
    16 - 3.12 FINISH AND WORKMANSHIP
    17 - SECTION 4 PERFORMANCE REQUIREMENTS
    17 - 4.1 SCOPE OF SECTION
    17 - 4.2 WATERTIGHTNESS PRESSURE TEST
    17 - 4.3 STRENGTH OF FABRICATED JOINT (TORQUE TEST)
    17 - 4.4 STRENGTH OF JOINT ASSEMBLY (PRESSURE CYCLING TEST)
    17 - 4.5 RESISTANCE TO PULL-OUT OF ASSEMBLED JOINTS
    17 - 4.6 STRENGTH OF NUT AND ASSEMBLY (TORQUE TEST)
    17 - 4.7 THERMAL CYCLING TEST FOR JOINTS CONTAINING NON-METALLIC COMPONENTS
    17 - 4.8 WATERTIGHTNESS UNDER INTERNAL HYDROSTATIC PRESSURE WHILST SUBJECTED TO BENDING
    18 - 4.9 METHOD FOR DETERMINING COMPATIBILITY OF FITTINGS WITH PIPE
    18 - 4.10 ROLL-GROOVED ASSEMBLY (JOINT PRESSURE RESISTANCE TEST)
    19 - SECTION 5 CAPILLARY FITTINGS-COPPER AND COPPER ALLOY
    19 - 5.1 SCOPE OF SECTION
    19 - 5.2 DESIGN AND DIMENSIONS
    19 - 5.2.1 General
    19 - 5.2.2 Internal diameter of socket
    19 - 5.2.3 Length of socket
    19 - 5.2.4 Wall thickness
    20 - 5.2.5 Branches of different nominal size
    20 - 5.2.6 Waterway diameter
    21 - 5.3 PERFORMANCE REQUIREMENTS
    22 - SECTION 6 COMPRESSION FITTINGS
    22 - 6.1 SCOPE OF SECTION
    22 - 6.2 DESIGN
    22 - 6.2.1 Copper alloy compression fittings manufactured to dimensions
    22 - 6.2.2 Compression fittings complying with performance requirements
    22 - 6.3 PERFORMANCE REQUIREMENTS
    22 - 6.3.1 Compression fittings complying with Clause 6.2.1
    22 - 6.3.2 Compression fittings complying with Clause 6.2.2
    25 - SECTION 7 THREADED-END CONNECTORS
    25 - 7.1 SCOPE OF SECTION
    25 - 7.2 DIMENSIONS
    25 - 7.3 DESIGN
    25 - 7.3.1 Thread stop
    25 - 7.3.2 Wrenching flats
    25 - 7.3.3 Thickness of threaded-end connectors
    25 - 7.3.4 Thread sealing
    25 - 7.4 PERFORMANCE REQUIREMENTS
    28 - SECTION 8 UNION END CONNECTORS AND COUPLINGS
    28 - 8.1 SCOPE OF SECTION
    28 - 8.2 DESIGN
    28 - 8.2.1 Minimum wall thickness
    28 - 8.2.2 Screw threads
    28 - 8.2.3 Provision for tightening
    28 - 8.2.4 Performance requirements
    29 - SECTION 9 ROLL-GROOVED JOINTING END CONNECTORS AND COUPLING BODY
    29 - 9.1 SCOPE OF SECTION
    29 - 9.2 MATERIALS
    29 - 9.2.1 Coupling
    29 - 9.3 DESIGN
    29 - 9.3.1 Fittings
    30 - 9.3.2 Coupling
    31 - 9.4 PERFORMANCE REQUIREMENTS AND TEST METHODS
    31 - 9.5 INSTALLATION INSTRUCTIONS
    32 - SECTION 10 MECHANICAL JOINTING END CONNECTORS
    32 - 10.1 SCOPE OF SECTION
    32 - 10.2 DESIGN
    32 - 10.2.1 General
    32 - 10.2.2 Joint assembly-Mechanical-friction locked-end connectors
    32 - 10.2.3 Joint assembly-Press-fit end connectors
    32 - 10.3 PERFORMANCE
    32 - 10.4 INSTALLATION INSTRUCTIONS
    33 - SECTION 11 OTHER COPPER ALLOY FITTINGS
    33 - 11.1 SCOPE OF SECTION
    33 - 11.2 THREADED SOCKETS
    33 - 11.3 REDUCING BUSHES WITH OVERLAPPING INTERNAL AND EXTERNAL THREADS
    34 - 11.4 CONTINUOUSLY THREADED FITTINGS
    34 - 11.5 PERFORMANCE REQUIREMENTS
    35 - APPENDIX A - MEANS FOR DEMONSTRATING COMPLIANCE WITH THIS STANDARD
    35 - A1 SCOPE
    35 - A2 RELEVANCE
    35 - A3 PRODUCT CERTIFICATION
    35 - A4 DEFINITIONS
    35 - A4.1 Batch release test
    35 - A4.2 Production batch
    35 - A4.3 Sample
    35 - A4.4 Sampling plan
    35 - A4.5 Type test batch
    35 - A4.6 Type testing (TT)
    36 - A5 TESTING
    36 - A5.1 Type testing
    36 - A5.2 Batch release testing
    36 - A5.3 Retesting
    36 - A6 TYPE TESTS
    38 - A7 BATCH TESTS
    39 - APPENDIX B - LIST OF REFERENCED DOCUMENTS
    41 - APPENDIX C - SIZES AND TYPES OF FITTINGS
    41 - C1 GENERAL
    41 - C2 END CONNECTIONS
    41 - C2.1 Screw-threaded sealing connections
    41 - C2.2 Screw-threaded fastening connections
    41 - C2.3 Capillary fittings
    41 - C2.4 Compression fittings
    42 - C3 EXAMPLES
    44 - APPENDIX D - WATERTIGHTNESS PRESSURE TEST
    44 - D1 SCOPE
    44 - D2 PRINCIPLE
    44 - D3 APPARATUS
    45 - D4 TEST CONDITIONS
    45 - D5 PROCEDURE
    45 - D5.1 Hydrostatic test (all fittings)
    45 - D5.2 Pneumatic test (in conjunction with hydrostatic test for cast fittings only)
    45 - D6 TEST REPORT
    46 - APPENDIX E - STRENGTH OF FABRICATED JOINT-TORQUE TEST
    46 - E1 SCOPE
    46 - E2 PRINCIPLE
    46 - E3 APPARATUS
    46 - E4 PROCEDURE
    46 - E5 TEST REPORT
    48 - APPENDIX F - STRENGTH OF JOINT ASSEMBLY-PRESSURE CYCLING TEST
    48 - F1 SCOPE
    48 - F2 PRINCIPLE
    48 - F3 APPARATUS
    48 - F4 PROCEDURE
    49 - F5 TEST REPORT
    50 - APPENDIX G - RESISTANCE TO PULL-OUT OF ASSEMBLED JOINTS
    50 - G1 SCOPE
    50 - G2 PRINCIPLE
    50 - G3 APPARATUS
    50 - G4 TEST ENVIRONMENT
    50 - G4.1 Metal joints
    50 - G4.2 Composite joints
    51 - G5 PROCEDURE
    52 - G6 TEST REPORT
    53 - APPENDIX H - STRENGTH OF NUT AND ASSEMBLY-TORQUE TEST
    53 - H1 SCOPE
    53 - H2 PRINCIPLE
    53 - H3 APPARATUS
    53 - H4 PROCEDURE
    54 - H5 TEST REPORT
    55 - APPENDIX I - THERMAL CYCLING TEST
    55 - I1 SCOPE
    55 - I2 PRINCIPLE
    55 - I3 APPARATUS
    55 - I4 ASSEMBLY
    55 - I5 PROCEDURE
    56 - I6 TEST REPORT
    57 - APPENDIX J - METHOD FOR DETERMINING WATERTIGHTNESS UNDER INTERNAL HYDROSTATIC PRESSURE WHILST SUBJECTED TO BENDING
    57 - J1 SCOPE
    57 - J2 APPARATUS
    57 - J3 PREPARATION OF JOINT ASSEMBLIES
    58 - J4 PROCEDURE
    58 - J5 TEST REPORT
    59 - APPENDIX K - METHOD FOR DETERMINING COMPATIBILITY OF FITTINGS WITH PIPE
    59 - K1 SCOPE
    59 - K2 PRINCIPLE
    59 - K3 APPARATUS
    60 - K4 PREPARATION OF TEST SPECIMENS
    60 - K5 CONDITIONING OF TEST SPECIMENS
    60 - K6 PROCEDURE
    61 - K7 TEST REPORT
    62 - APPENDIX L - ROLL-GROOVED ASSEMBLY JOINT PRESSURE RESISTANCE TEST
    62 - L1 SCOPE
    62 - L2 PRINCIPLE
    62 - L3 APPARATUS
    62 - L4 TEST CONDITIONS
    63 - L5 PROCEDURE
    63 - L6 TEST REPORT
    64 - APPENDIX M - SIMULATED SAMPLES
    64 - M1 SCOPE
    64 - M2 GENERAL
    64 - M3 TYPICAL EXAMPLES OF SIMULATED SAMPLES
    64 - M4 SPECIAL ISSUES
    65 - M5 COMPONENT DOCUMENTATION
    65 - M6 ACCEPTANCE

    Abstract - (Show below) - (Hide below)

    Specifies requirements for metallic body pipe fittings and connectors for use with copper tubes and stainless steel pipes and tubes and adaptor fittings for connection to other pipe materials in water supply and gas systems where the normal working temperature does not exceed 95 degrees Celsius, and where the maximum operating pressure does not exceed 1.4MPa.

    Scope - (Show below) - (Hide below)

    This Standard specifies requirements for metallic body pipe fittings and connectors for use with copper tubes and stainless steel pipes and tubes and adaptor fittings for connection to other pipe materials in water supply and gas systems where the normal working temperature does not exceed 95°C, and where the maximum operating pressure does not exceed 1.4 MPa.Products designed for a temperature in excess of 95°C are included where tested to the appropriate temperature criteria.NOTES:1 For fittings used for gas applications, see AS5601.2 Illustrations used in this Standard are diagrammatic only and have been chosen without prejudice.

    General Product Information - (Show below) - (Hide below)

    Committee WS-001
    Document Type Standard
    Publisher Standards Australia
    Status AvailableSuperseded
    Superseded By
    Supersedes
    Under Revision

    History - (Show below) - (Hide below)

    First published as AS3688-1994.Third Edition AS3688-2005. Originated as AS 3688-1994. Third Edition AS 3688-2005. Reissued incorporating Amendment No. 1 (October 2006).

    Standards Referenced By This Book - (Show below) - (Hide below)

    AS 1834.1-1991 Material for soldering Solder alloys (Reconfirmed 2018)
    AS 5601-2004 Gas installations
    AS 1349-1986 Bourdon tube pressure and vacuum gauges (Reconfirmed 2018)
    AS 1646.3-2000 Elastomeric seals for waterworks purposes - Material requirements for pipe joints seals used in water and wastewater applications with the exception of natural rubber and polyisoprene compounds
    AS/NZS 3500.4:2003 Plumbing and drainage Heated water services
    AS/NZS 1568:1998 Copper and copper alloys - Forging stock and forgings
    AS 1432-2004 Copper tubes for plumbing, gasfitting and drainage applications
    AS 2345-1992 Dezincification resistance of copper alloys
    AS 1646.1-2000 Elastomeric seals for waterworks purposes - General requirements
    AS/NZS 1567:1997 Copper and copper alloys - Wrought rods, bars and sections (Reconfirmed 2021)
    AS/NZS 4020:2005 Testing of products for use in contact with drinking water
    AS/NZS 4020:2002 Testing of products for use in contact with drinking water
    AS 1572-1998 Copper and copper alloys - Seamless tubes for engineering purposes (Reconfirmed 2018)
    AS 1646.4-2005 Elastomeric seals for waterworks purposes Material requirements for pipe joint seals used in water and wastewater applications - Thermoplastic elastomers and vulcanizates
    AS 1722.2-1992 Pipe threads of Whitworth form Fastening pipe threads (Reconfirmed 2017)
    AS 1167.1-1993 Welding and brazing - Filler metals Filler metal for brazing and braze welding
    AS 1722.1-1975 Pipe threads of Whitworth form Sealing pipe threads (metric units)
    AS/NZS 3500.1:2003 Plumbing and drainage Water services
    AS 2136-1977 Method for detecting the susceptibility of copper and its alloys to stress corrosion cracking using the mercurous nitrate test (Reconfirmed 2018)
    AS 2738-2000 Copper and copper alloys - Compositions and designations of refinery products, wrought products, ingots and castings (Reconfirmed 2018)
    AS 1565-1996 Copper and copper alloys - Ingots and castings (Reconfirmed 2020)
    AS/NZS 1167.1:2005 Welding and brazing - Filler metals Filler metal for brazing and braze welding
    AS/NZS 3707:2001 Method for testing pressure cycling resistance of pipes and fittings
    AS 1646.2-2000 Elastomeric seals for waterworks purposes Material requirements for pipe joint seals used in water and wastewater applications - Specifies by prescription formulation
    AS/NZS 3500.0:2003 Plumbing and drainage Glossary of terms
    AS 3558.5-1999 Methods of testing plastics and composite materials sanitary plumbing fixtures Determination of degradation by ultraviolet light (Reconfirmed 2016)
    AS 2345-2006 Dezincification resistance of copper alloys
    AS 2831-1985 Thermometers - Solid stem - Long and short - For precision use

    Standards Referencing This Book - (Show below) - (Hide below)

    AS 4554-2005 Gas laundry dryers (Reconfirmed 2016)
    AS 5200.458-2008 Plumbing and drainage products Universal plastic-bodied transition couplings
    AS 3517-2007 Capillary fittings of copper and copper alloy for non-pressure sanitary plumbing applications (Reconfirmed 2018)
    AS 4553-2008 Gas space heating appliances
    AS/NZS 4766:2006 Polyethylene storage tanks for water and chemicals
    AS 5200.000-2006 Technical specification for plumbing and drainage products Procedures for certification of plumbing and drainage products (Reconfirmed 2018)
    AS 2896-1998 Medical gas systems - Installation and testing of non-flammable medical gas pipeline systems
    AS/NZS 4645.2:2008 Gas distribution networks Steel pipe systems
    AS/NZS 5601.2:2010 Gas installations LP Gas installations in caravans and boats for non-propulsive purposes
    AS 1357.1-2004 Valves primarily for use in heated water systems - Protection valves
    AS/NZS 2845.1:2010 Water supply - Backflow prevention devices Materials, design and performance requirements
    AS 5200.037.2-2008 Plumbing and drainage products Flow controllers for use with heated or cold water systems (Reconfirmed 2016)
    ATS 5200.490-2007 Technical Specification for plumbing and drainage products Cross-linked polyethylene/ aluminium/polyethylene-composite pipe systems for pressure applications (Reconfirmed 2018)
    AS/NZS 3499:2006 Water supply - Flexible hose assemblies (Reconfirmed 2016)
    ATS 5200.050-2005 Technical Specification for plumbing and drainage products Prefabricated bathroom modules
    AS 5830.1-2012 In-line ball valves for use in plumbing water supply systems Metal-bodied
    AS/NZS 4692.1:2005 Electric water heaters Energy consumption, performance and general requirements (Reconfirmed 2016)
    AS 1172.2:2014 Sanitary plumbing products Flushing devices and cistern inlet and outlet valves
    AS/NZS 3500.5:2012 Plumbing and drainage Housing installations
    AS 1697-2005 Installation and maintenance of steel pipe systems for gas
    AS 4032.2-2005 Water supply - Valves for the control of hot water supply temperatures Tempering valves and end-of-line temperature-actuated devices (Reconfirmed 2015)
    AS/NZS 3500.4:2003 Plumbing and drainage Heated water services
    AS/NZS 3500.2:2003 Plumbing and drainage Sanitary plumbing and drainage
    AS 5082.2-2007 Polybutylene (PB) plumbing pipe systems - Metric series Mechanical and fusion jointing systems (Reconfirmed 2017)
    MP 52-2005 Manual of authorization procedures for plumbing and drainage products
    AS 1357.2-2005 Valves primarily for use in heated water systems Control valves (Reconfirmed 2015)
    AS 1628-1999 Water supply - Metallic gate, globe and non-return valves
    AS 4041-2006 Pressure piping (Reconfirmed 2016)
    ATS 5200.478-2006 Technical Specification for plumbing and drainage products Cross-linked polyethylene/Aluminium/Cross-linked polyethylene macro-composite pipe systems for pressure applications
    ATS 5200.420-2005 Technical Specification for plumbing and drainage products Trap-priming valves
    ATS 5200.037.1-2006
    AS 4176-1994 Polyethylene/aluminium and cross-linked polyethylene/aluminium macro-composite pipe systems for pressure applications
    AS 1361-1995 Electric heat-exchange water heaters - For domestic applications (Reconfirmed 2016)
    AS/NZS 3718:2005 Water supply - Tap ware (Reconfirmed 2016)
    ATS 5200.472-2006 Technical Specification for plumbing and drainage products Heated water system recirculation device
    AS/NZS 2642.3:1994 Polybutylene pipe systems - Mechanical jointing fittings for use with polybutylene (PB) pipes for hot and cold water applications
    AS/NZS 5601.1:2013 Gas installations General installations
    AS 4775-2007 Emergency eyewash and shower equipment
    ATS 5200.053-2006 Technical Specification for plumbing and drainage products Stainless steel pipes and tubes
    AS 1910-2004 Water supply - Float control valves for use in hot and cold water (Reconfirmed 2016)
    AS 2537-1994 Mechanical jointing fittings for use with cross-linked polyethylene (PE-X) pipe for hot and cold water applications
    ATS 5200.491-2010 Technical Specification for plumbing and drainage products Aluminium alloy piping system with plastics lining for plumbing water service applications
    AS/NZS 2845.1:1998 Water supply - Backflow prevention devices Materials, design and performance requirements
    AS/NZS 3497:1998 Drinking water treatment units - Plumbing requirements
    AS 4551-2008 Domestic gas cooking appliances
    AS/NZS 5601.2:2013 Gas installations LP Gas installations in caravans and boats for non-propulsive purposes
    AS 2896-2011 Medical gas systems - Installation and testing of non-flammable medical gas pipeline systems
    AS 1357.1-2009 Valves primarily for use in heated water systems Protection valves
    ATS 5200.481-2006 Technical Specification for plumbing and drainage products Thermal switching valves
    AS 4643-2007 Overhead radiant tube gas heaters
    AS/NZS 5601.1:2010 Gas installations General installations
    AS 5263.0-2013 Gas appliances General requirements
    AS 5200.007-2008 Plumbing and drainage products Metal-bodied water hammer arresters
    AS 2118.1-2006 Automatic fire sprinkler systems General systems
    AS 5200.053-2008 Plumbing and drainage products Stainless steel pipes and tubes for pressure applications
    AS/NZS 3500.1:2003 Plumbing and drainage Water services
    AS 3498-2009 Authorization requirements for plumbing products - Water heaters and hot-water storage tanks
    AS/NZS 4129:2008 Fittings for polyethylene (PE) pipes for pressure applications
    ATS 5200.479-2006 Flood stop safety valve
    AS 3498-2003 Authorization requirements for plumbing products - Water heaters and hot-water storage tanks
    AS 1589-2001 Copper and copper alloy waste fittings (Reconfirmed 2018)
    ATS 5200.030-2007 Technical Specification for plumbing and drainage products Solenoid valves
    AS 5830.2-2012 In-line ball valves for use in plumbing water supply systems Plastics-bodied
    ATS 5200.486-2008 Technical Specification for plumbing and drainage products Sprinklers for home applications
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