PART 0. Front Cover Graphics by Nuttshell Graphics, North Melbourne. Standard drawings by Loburn Pty Ltd, West Lakes, South Australia.

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1 WSA Water Supply Code of Australia (Hunter Water Edition) Version 1 Comparison with WSA Water Supply Code of Australia (Hunter Water Edition) Version 2 CLAUSE WSA (Hunter Water Edition) Version 2 WSA (Hunter Water Edition) Version 1 Acknowledgements Delete contributors and insert the following: PART 0 The WSAA Board would like to express its appreciation to WSAA Members, Associates and staff for their contributions to the revision of the first edition of the Code. Contributions from other industry organisations and individuals are also gratefully ackno wledged. In particular the following contributors deserve special mention for their productive work and commitment to the revision of this Code: Delete Front Cover Graphics Delete Standard Drawings Delete Printing Disclaimer delete Inc. and insert Limited Copyright delete and insert the following: COPYRIGHT Water Services Association of Australia will permit up to 10 percent of Part 1 of this Code to be copied for use exclusively in house by purchasers of this Code without payment of a royalty or giving advice to Water Services Association of Australia Limited. Water Services Association of Australia will also permit some or all of Part 2 of the Code to be copied for use in contract documentation and for training purposes. Copyright 2011 by WATER SERVICES ASSOCIATION of Australia Limited ALL RIGHTS RESERVED Front Cover Graphics by Nuttshell Graphics, North Melbourne. Standard drawings by Loburn Pty Ltd, West Lakes, South Australia. Printing by Standards Australia, National Publishing. DISCLAIMER WSAA Codes are published by the Water Services Association of Australia Inc. on the understanding that: The Water Services Association of Australia Inc. and individual contributors are not responsible for the results of any action taken on the basis of information in the Water Supply Code of Australia, nor any errors or omissions. The Water Services Association of Australia Inc. and individual contributors disclaim all a nd any liability to any person in respect of anything, and the consequences of anything, done or omitted to be done by a person in reliance upon the whole or any part of the Water Supply Code of Australia. PUBLICATION DETAILS Published by: Water Services Association of Australia Inc. 469 Latrobe Street Melbourne Victoria 3000 Australia ISBN COPYRIGHT Water Services Association of Australia will permit up to 10 percent of Parts 1 and 2 of this Code to be copied for use exclusively in house by purchasers of this Code without payment of a royalty or giving advice to Water Services Association of Australia Inc. Water Services Association of Australia will also permit some or all of Parts 3 and 4 of the Code to be copied for use in contract documentation. Page 1 of 37

2 Foreword Delete existing clause Insert new clause as follows: It gives me great pleasure to present the third edition of the WATER SUPPLY CODE OF AUSTRALIA. An initiative of THE Water Services Association of Australia (WSAA), this revised edition brings together my members collective experiences of adoption of the second edition into their asset creation processes, along with the significant contributions of specia list networks, industry associations and individual practitioners. In recent years Australia s water sector, both urban and rural, has faced the full impact of climate variability and change. Diminishing rainfall, reduced runoff and consequent lower yields have undercut water security and resulted in water shortages in many cities and towns. More recently, floods have caused major threat, loss of life, damage and disruption, and challenged water infrastructure. Dramatic climate shifts and the potential for more extreme weather events present big challenges to Australia s urban water utilities. Uncertainty and the prospect of climate change require the water industry as a major utility sector, to adapt. In response to these challenges, the urban water industr y has already implemented a series of adaptation initiatives. To address the primary threat (of inadequate water supply) governments and water utilities have responded through major water saving and supply augmentation initiatives to improve reliability. The need for supply augmentation is compounded by increasing demand for water arising from rapid population growth. This has been the first major response to what modelling suggests is likely to be the ongoing impact of climate change. While the science will continue to improve and become more finely grained, current climate models and projections suggest that there is more change and variability to come, demanding ongoing adaptation. While the immediate water supply challenge has been averted, many significant issues remain, including: Maintaining both water quality and water quantity in the context of climate change and extreme weather events such as heatwaves, bushfires or floods. Managing, maintaining and investing in critical water infrastructure. Developing agreed decision-making tools that incorporate the complexities and uncertainty posed by climate change. Integrating water planning fully with urban planning to develop resilient Cities of the Future that successfully deal with climate change, population growth and demographic change. WSAA Codes can make a contribution to these challenges by adapting technical requirements for planning, design and construction of water supply and sewerage network infrastructure, which makes up over 60% of the capital investment in the urban water industry and which can have a profound impact on our performance. This revised edition addresses the planning, design and construction of water and non -drinking supplies, and incorporates much of the additional material published by utilities that have adopted the Code. It has been simplified to two parts that address planning and design and construction, testing and commissioning. Standard drawings have been replaced by figures throughout the Code to demonstrate design and/or construction principles that need to be incorporated in a set of project specific design drawings. It is important that designers understand that it is their responsibility to provide the constructor with all the necessary information i.e. design drawings, project specification etc. to efficiently and safely build these assets to deliver water services sustainably for current and future generations. Copyright 2002 by WATER SERVICES ASSOCIATION of Australia Inc. All rights reserved It gives me great pleasure to present the second edition of the WATER SUPPLY CODE OF AUSTRALIA. An initiative of the Water Services Association of Australia (WSAA), this revised edition brings together my members and associates collective experiences of adoption of the first edition into their asset creation processes. This revised edition also now addresses the design and construction of water supply, as distinct from reticulation only. However, the clear benefits of this initiative extend beyond my members to the wider Australian community. The performance of network infrastructure is fundamental to achieving excellence in community health, customer service, environmental sustainability, and delivering cost effective water and sewerage services. This revised Code will make a practical contribution to better achieving those goals. Cost savings in design and construction can deliver major benefits. Currently, water supply networks accounts for 65% of the $26 billion current replacement costs of the total water supply infrastructure in Australia s major cities. Sewage collection systems account for 82% of the $28 billion current replacement cost of the total sewerage infrastructure. Water utilities and the urban development industry are investing some $500 million annually in water and sewerage networks. Water supply and sewerage networks are made up of a multitude of components including pipes, fittings, valves, connectors, access chambers and so on. Historically, Australia s urban water utilities have developed local standards and codes for the design and construction of these networks. The wide variety of requirements for pipeline systems, designed to achieve essentially the same objectives, has created small fragmented markets for those components leading to higher costs. Standards have also focussed more on prescription than the performance required. Costs are high, innovation is stifled and export opportunities lost. The Water Services Association of Australia is ideally positioned to provide national leadership in actively prosecuting its National Codes Initiative. As an industry association of the major urban water utilities in Australia, WSAA s 22 members supply some 14 million Australians with water and sewerage services. In developing Codes of practice, WSAA is working to provide a complete asset management framework to support the total life cycle of our network infrastructure. Best practice and strategic standardisation are the principal drivers to delivering living codes and ensuring that water and sewerage assets are fit for purpose and cost effective. Materials and product specifications, quality assurance policies, certification programs, design an d construction codes, research and development initiatives and competency-based training schemes will support and form a total package of industry practices that can deliver the outcomes for an internationally competitive Australian water industry. Dr John Langford BE (Ag) PhD FTSE FIE Aust Executive Director of the Water Services Association of Australia Page 2 of 37

3 WSAA, through the auspices of City West Water, is facilitating delivery of a designer competency assurance scheme using the Codes as the underpinning reference for designer training. The clear benefits of these Codes extend beyond my members to the wider Australian community. The performance of network infrastructure is fundamental to achieving excellence in community health, commerce and industry, customer service, asset management and delivering sustainable water and sewerage services. The third edition of this Code will make a practical contribution to better achieving these goals. Contents WSAA is ideally positioned to provide national leadership in actively prosecuting its National Codes Initiative that commenced in As an industry association of the urban water utilities in Australia, WSAA s members supply the majority of Australian residential, commercial and industrial consumers with water and sewerage services. In developing Codes that articulate appropriate planning, design and construction practices, WSAA is providing a valuable training resource that can assist in building asset management capability and capacity necessary for the ongoing reliable and successful performance of our network infrastructure. Delete existing Contents Insert the following Contents: PREFACE 7 INTRODUCTION 10 PART 0: GLOSSARY OF TERMS AND ABBREVIATIONS I Glossary of Terms 16 II Abbreviations 31 III Referenced Documents 35 PART 1: PLANNING AND DESIGN Contents 38 1 General 51 2 System Planning 64 3 Hydraulic Design 90 4 Products and Materials 99 5 General Design System Pressure Management Structural Design Appurtenances Design Review and Drawings 218 PART 2: CONSTRUCTION Contents General General Construction Products and Materials 241 PREFACE 6 INTRODUCTION 9 PART 0: GLOSSARY OF TERMS AND ABBREVIATIONS I Glossary of Terms 14 II Abbreviations 25 III Referenced Documents 28 IV Other References 32 PART 1: PLANNING AND DESIGN Contents 36 1 General 42 2 System Planning 56 3 Hydraulic Design 71 4 General Design 80 5 Structural Design Appurtenances Design Review and Drawings 133 PART 2: PRODUCTS AND MATERIALS Contents Products and Materials Overview 140 Appendix A Quality Assurance of Products and Materials 151 PART 3: CONSTRUCTION Contents General 162 Page 3 of 37

4 13 Excavation Bedding for Pipes Pipe Laying, Jointing and Connecting Pipe Embedment and Support Fill Swabbing Acceptance Testing Disinfection Tolerances on As-Constructed Work Connections to Existing Water Mains Restoration Work As Constructed Details 289 PART 3: DRAWINGS Contents 292 HW 25 Introduction 295 HW 26 Listing of Drawings 297 HW 27 Commentary on WAT-1100 Series Pipeline Layout 300 HW 28 Commentary on WAT-1200 Series Embedment, Trench Fill and Restraints 303 HW 29 Commentary on WAT-1300 Series Installation Practices/Structures 308 HW 30 Commentary on WAT-1400 Series Fabrication Details 311 HW 31 Commentary on WAT-1800 Series Dual Water Supply Systems Quality Not used General Construction Not used Products and Materials Excavation Bedding for Pipes Pipe Laying and Jointing Pipe Embedment and Support Fill Swabbing Acceptance Testing Disinfection Not used Tolerances on As-Constructed Work Connections to Existing Water Mains Restoration Work As Constructed Details Not used 185 PART 4: STANDARD DRAWINGS Contents Introduction Listing of Standard Drawings Commentary on WAT-1100 Series Drawings Commentary on WAT-1200 Series Drawings Commentary on WAT-1300 Series Drawings Commentary on WAT-1400 Series Drawings 207 STANDARD DRAWINGS 210 WAT-1100 Series Drawings Pipeline Layout WAT-1200 Series Drawings Embedment, Trench Fill And Restraints WAT-1300 Series Drawings Installation Practices And Structures WAT-1400 Series Drawings Fabrication Details HUNTER WATER APPENDICES HW1 Environmental Considerations HW2 Water Mains in Slip and Potentially Unstable Areas HW3A Drawing Requirements HW3B Work As Constructed Drawings HW4 Under Pressure Cut-In Connections HW5 Telemetry Signal Requirements Page 4 of 37

5 Preface CLAUSE WSA (Hunter Water Edition) Version 2 WSA (Hunter Water Edition) Version 1 1 st paragraph 2 nd dot point delete Manufacture and 2 nd paragraph 1 st dot point delete enables and insert facilitates 2 nd paragraph 2 nd dot point delete ensures and insert assures 2 nd paragraph 4 th dot point delete obviates and insert reduces The Benefits of National Codes 3 rd paragraph 1 st sentence - delete have adopted the first and insert adopted the previous The Benefits of National Codes 3 rd paragraph 2 nd sentence delete second editions and insert third editions Project Specification delete Part 3: Construction, and including reference to or attachment of the relevant Standard Drawings (Part 4) and insert Part 2 Construction and Product Specifications (WSAA website). Where necessary, project specific details are to be included in the relevant Product Specifications. The WSAA Website delete existing clause and insert the following: The following information is available from the WSAA website More information may be added over the life of this edition: Code Appendices Product Specifications Product and Material Information and Guidance Water Industry Product Standards Technical Notes Product Appraisal Reports THE NEED FOR TECHNICAL DOCUMENTATION The Water Supply Code of Australia, together with a Water Agency supplement and other referenced documents, sets an Agency s requirements for: Minimum acceptable technical criteria for design and construction of water supply and reticulation networks; and Manufacture and supply of associated products and materials. This set of documentation has a number of benefits. It: enables ready acquisition from different suppliers of assets of a recognised acceptable quality; ensures assets have acceptable levels of buildability, operability and maintainability; takes account of whole-of-life costs; facilitates efficient design and construction i.e. it obviates the need for Water A gencies to develop and maintain their own standards; limits risk exposure of both the principal and suppliers; facilitates controlled improvements to asset designs, usage of products and materials, and construction and acceptance testing methods; and facilitates quality assurance and inspection. The Benefits of National Codes Historically, Australia s urban water authorities developed and enforced their own parochial standards for design, construction, materials and products. The wide variety of requirement s for pipeline systems created small, fragmented markets and hindered the mobility of suppliers, leading to higher costs than necessary. National Codes, which commenced publication 1999: facilitate consistent national reform and regulation of the water industry; provide a transitional mechanism for sharing water-industry specialist expertise as internal Water Agency resources diminish; provide a common technical reference for the development of industry training and skills accreditation programs for private sector suppliers; enhance the mobility of suppliers e.g. designers and constructors by reducing parochial technical impediments to trade; and improve the Australian water industry s interface with international water companies. WSAA members and associate members have adopted the first editions of the Codes with supplementary requirements and technical variations. The second editions of the Codes address many of the supplementary requirements and variations such that the extent of the Agency supplements is expected to decrease markedly. The Codes are presented in performance based terms together with deemed -to-comply solutions. Alternative solutions may be accepted provided it can be demonstrated that they meet the performance requirements. Innovation The word innovation has become a euphemism for doing anything differently, though not necessarily better. Page 5 of 37

6 Dictionaries variously define innovation as to introduce novelties i.e. anything new or strange; to make changes. On closer scrutiny, many changes may be shown to be technically inferior and/or more costly in life cycle terms. Standardisation and innovation are somewhat conflicting but associated concepts, some characteristics of which are outlined below. Standardisation may generate a number of benefits; however, without innovation, standards can lock in historical practice at the expense of best practice. Genuine innovative ideas and methods that enhance functionality and reduce life cycle costs are to be encouraged but must be considered and adopted through an appropriate screening process. Designs/Construction Practices:WSAA members have agreed to inform each other of innovative trials, to share information and to work with one another and with industry in challenging accepted standards and practices and achieving more effective and efficient outcomes. Products: WSAA has developed a national product appraisal system that provides a single point of entry into the market for strategic product manufacturers, developers and innovators. Whilst a successfully appraised product will generally have universal appeal, it should be clearly understood that a finding by WSAA that a product is fit for purpose and has acceptable life expectancy does not automatically mean it is authorised for use by a Water Agency. Other considerations may necessitate restrictions being placed on the number or type of products accepted for use in a particular network. HYPOTHETICAL EXAMPLE OF THE USE OF THE WATER SUPPLY CODE When an agency s administrative and process requirements are contractually coupled with this Code, the scenario outlined below illustrates a typical use of the Water Supply Code of Australia in asset creation. Concept Plan The Agency s Concept Plan defines the broad water supply management objectives an d states the available system to which the planned scheme will connect, allowable pressures and flows and, if necessary, augmentation requirements. For a small development, the Plan may simply state the point of connection for a nominally sized reticulation system. Agency / Development Agreement The Agency, via a formal agreement or contract, instructs the Developer that all network infrastructure shall comply with the deemed-to-comply technical requirements of the Code. Special or alternative technical solutions would require formal approval by the Agency s representative. Project Manager Accountability for the total project design, construction and connection is vested in a Project Manager who is responsible for managing all facets of the project, including procurement of Page 6 of 37

7 Introduction CLAUSE WSA (Hunter Water Edition) Version 2 WSA (Hunter Water Edition) Version 1 Delete existing clauses Insert new clauses as follows: SCOPE OF CODE This Code focuses on technical requirements for design and construction of water infrastructure and specifications for infrastructure products. WSAA members operate under various state/regional legislative and regulatory constraints; they generally have or ganisation-specific design, construction and testing services. The Project Manager s system would include the necessary procedures, check lists etc addressing the Agency s process and administrative requirements and technical elements of the Code. The Project Manager is responsible for ensuring that all suppliers have the necessary technical qualifications / accreditation. Design Under the control of the Project Manager s management system and using the Code as the principal design input, the Designer prepares Design Drawings in which the scheme layout, component sizing, class and material options comply with the criteria of the Code. Project Specification The Designer (or Project Manager) prepares a project Specification, to accompany the Design Drawings, for issue to the Constructor. The project Specification may be prepared by cutting and pasting standard elements of Part 3: Construction, and including reference to or attachment of the relevant Standard Drawings (Part 4) and Product Specifications (WSAA website). Constructor The Constructor is engaged by the Project Manager to build the asset in accordance with the project Specification. The Constructor works under the control of the Project Manager s management system, including adherence to ITPs, witness and hold points etc. The Constructor is responsible for ensuring that all procured materials and products are listed in an Agency s authorised products schedule and/or comply with the nominated Product Specifications, as well as being stored and installed without damage and in accordance with the Specification and Design Drawings. The Constructor provides details to the Designer for preparation of work -asconstructed drawings. Testing Testers (compaction, pressure, etc) work under the Project Manager s control and conduct tests in accordance with the requirements of the Code. The WSAA Website The first editions of the Codes contained a wide variety of product guidance and information. A decision has been made to transfer most of that information to the WSAA website where it can more efficiently be managed and kept current. The following information is now available from the website. More information may be added over the life of this edition: Product Specifications Product and Material Information and Guidance Water Industry Product Standards Technical Notes Product Appraisal Reports Scope of Code The Water Supply Code of Australia covers the planning, design and construction of transfer, distribution and reticulation mains and service pipes up to DN 1200 and larger. The Code does not specifically address water reticulation used in private and community title developments that are connected to a Water Agency s reticulation system. However, where those mains are likely to be maintained by the Water Agency or its contractor, it is recommended that the Water Supply Code be adopted as a deemed-to-comply solution for the water services Page 7 of 37

8 asset creation processes and contract documentation that take precedence over the Code. The syntax / format of many clauses of previous editions implied the Code mandated requirements for safety, quality and environmental management, asset creation and operational processes. This was not intended. This 3rd edition of the Water Supply Code of Australia assumes that each adopting agency will specify its requirements for such matters. As appropriate, the Code includes informative notations. An adopting Water Agency may vary this Code to address the Agency s specific needs and to complement its contract, process and other documents. The Water Supply Code of Australia covers the planning, design and construction of transfer, distribution and reticulation drinking and non-drinking water mains and service pipes nominally up to DN Concepts apply to larger sized mains. The Code does not specifically address water reticulation in private and community title developments that are connected to a Water Agency s reticulation system. However, where those mains are likely to be maintained by the Water Agency or its contractor, it is recommended that the Water Supply Code be adopted as a deemed-to-comply solution for reticulated water services specified in the National Plumbing Code. CODE PURPOSE The primary purpose of the Water Supply Code of Australia is to document technical best practice for design and construction of water supply networks. The Code is an element of the overall asset management framework that WSAA is developing for its members network infrastructure. The Code focuses on asset creation, but it could be used for some of the intervention options such as replacement and renewal. The Code is intended for Planners, Designers and Constructors servicing the land development industry and for contract work done on behalf of Water Agencies for asset management. The Code does not provide administrative or process guidance that is specific to each Water Agency, which will be dependent on the nature of the works, whether they are developer or capital works employing Deed of Agreement or contract documents. The Water Supply Code of Australia Hunter Water Edition includes: Hunter Water s requirements for specific detail which the Code anticipates individual water agencies will address, and additions, deletions and variations to the Code where the Code s requirements are not compatible with Hunter Water s current requirements (due to local practice, climatic, geographic and topographic conditions and statutory requirements, etc.) or where the Code is otherwise silent. Rather than indicating Hunter Water s variations in the form of a supplementary document, this edition of the Code has been edited such that it directly incorporates the changes wi thout the need to reference a second document. Any reference to the Water Supply Code of Australia ( the Code ) shall be deemed to refer to the Hunter Water Edition of the Code. The Code specifies mandatory requirements for the design and construction of sewers that are to become the responsibility of Hunter Water. Hunter Water reserves the right to specify or approve other design and/or construction requirements for particular projects and/or developments. Before commencement of any construction, Hunter Water s approval shall be obtained to any design and/or installation that does not comply with the Code. specified in the National Plumbing and Drainage Standard AS/NZS : Water supply Performance requirements. Code Structure The Water Supply Code of Australia is made up of separate parts, which address the technical requirements of the design and construction elements of the Water Agency asset creation and renewal processes. Each part of the Code is divided into sections and clauses with supporting figures and tables. Part 4 of the Code also has commentaries relevant to each series of Standard Drawings. A glossary of terms and interpretation of abbreviations is provided in Part 0, together with a list of referenced documents. Code Purpose The primary purpose of the Water Supply Code of Australia is to document technical best practice for design and construction of quality water networks. The Code is an element of the overall asset management framework that WSAA is developing for its members network infrastructure. The Code focuses on asset creation, but it could be used for some of the intervention options such as replacement and renewal that may be necessary with aging assets. The Code is intended for Planners, Designers and Constructors servicing the land development industry and for contract work done on behalf of Water Agencies for asset management. The Code does not provide administrative or process guidance that is specific to each Water Agency, which will be dependent on the nature of the works, whether they are developer or capital works employing Deed of Agreement or contract documents. The Water Supply Code of Australia Hunter Water Edition includes: Hunter Water s requirements for specific detail which the Code anticipates individual water agencies will address, and Additions, deletions and variations to the Code where the Code s requirements are not compatible with Hunter Water s current requirements (due to local practice, climatic, geographic and topographic conditions and statutory requirements, etc.) or where the Code is otherwise silent. Rather than indicating Hunter Water s variations in the form of a supplementary document, this edition of the Code has been edited such that it directly incorporates the changes without the need to reference a second document. Any reference to the Water Supply Code of Australia ( the Code ) shall be deemed to refer to the Hunter Water Edition of the Code. The Code specifies mandatory requirements for the design and construction of water mains that are to become the responsibility of Hunter Water. Hunter Water reserves the right to specify or approve other design and/or construction requirements for particular projects and/or developments. Before commencement of any construction, Hunter Water s approval shall be obtained to any design and/or installation that does not comply with the Code. Mandatory and Informative The Code provides a mixture of mandatory and informative statements. The mandatory requirements are a mixture of both prescriptive and performance requirements. Overall, the Code provides deemed-to-comply solutions to the planning, design and construction of water supply and reticulation mains and service pipes. The development of a Page 8 of 37

9 MANDATORY AND INFORMATIVE The Code provides a mixture of mandatory requirements and informative statements. The mandatory requirements are a mixture of prescriptive and performance statements. The informative statements provided in the Code have been interspersed throughout the mandatory requirements to provide some context and enable better understanding of the mandatory requirements. Informative text has been italicised to enable clearer differentiation. It is emphasised that the exact approach taken to all aspects of a particular water supply or reticulation project is the decision of the Water Agency and its authorised Planners, Designers and Constructors. This Code provides technical information to aid in that process. Appendices Appendices are located on the WSAA website and are linked to this Code. Appendices may be updated from time to time without any change to the version numbering of this Code. Appendices are a mixture of mandatory and informative requirements and follow the same style protocols as the Code. As necessary, documents referenced and abbreviations used are listed in each Appendix. Unless otherwise stated, all clause and table references refer to this Code. PRODUCT SPECIFICATIONS General Product Specifications (WSA PS nnn) are default specifications for standard products and materials used to construct water supply and sewerage network infrastructure conforming to WSAA Codes. Product Specifications are generic and the format recognises that individual Agencies may want to add or vary standard requirements for particular products. It is anticipated that adopting Agencies will independently publish details of adopted specifications, including varied and/or additional product specifications. Project-specific variations to these specifications or alternative specifications may be permitted by an Agency. The Product Specifications have been placed on the WSAA website for ease of access an d to enable regular updating and improvements. Each Product Specification is freely downloadable and is available in Word format upon request to info@wsaa.asn.au. It is anticipated that Product Specifications will be revised over the life of this edition to reflect changes in Standards and advice from users. Similarly, additional Product Specifications may be published. Hunter Water Product Specifications have been adapted from the WSAA Product Specifications to reflect Hunter Water s specific requirements for particular products and can be accessed on the Hunter Water website at Quality Assurance Each Product Specification nominates default quality assurance requirements for the product. The range of quality assurance options is based on international practice and is commensurate with the risk of failure. At the time of placing an order, it is recommended that the purchaser (e.g. Constructor) require the product supplier to declare that products delivered conform to the fully performance-based code underpinned by a standard deemed-to-comply solution document is high on WSAA s agenda. The information and guidance (informative text) contained in the Code has been deliberately interspersed throughout the mandatory requirements to provide some context and enable better understanding of the mandatory requirements. Informative text has been italicised to enable clearer differentiation. However, it is emphasised that the exact approach taken to all aspects of a particular water supply or reticulation project is the decision of the Water Agency and Planners, Designers and Constructors involved in each project. This Code provides technical information to aid in that process. Product Specifications The WSAA materials network, in conjunction with product suppliers, has developed a suite of default Product Specifications to assist with preparation of contract documentation. The Product Specifications have been kept as clear and simple as possible and do not repeat the need for requirements that are already covered by the relevant product standard. A range of quality assurance options based on international practice and commensurate with the risk of failure have been adopted. The Product Specifications have been placed on the WSAA website for ease of access and to enable regular updating and improvements. Each Product Specification is freely downloadable. It is anticipated that Product Specifications will be revised over the life of this edition to reflect changes in Standards and advice from users. Similarly, additional Product Specifications may be published. Hunter Water Product Specifications have been adapted from the WSAA Product Specifications to reflect Hunter Water s specific requirements for particular products and can be accessed on the Hunter Water website at PROPOSED AMENDMENTS WSAA invites users of this Code and its supporting documentation to propose amendments. An amendment proforma can be downloaded from To increase the likelihood of suggested amendments being adopted, it is recommended that users of the Code seek preliminary review by and support of a WSAA Member or Associate or other relevant organisation, for example, CSIRO, Civil Contractors Federation or PIPA for inclusion with the submission. Amendments will be published from time to time on the WSAA website. Users may register their interest so that published amendments can be ed directly. To register, please submit your name, position, company and contact details, together with the WSAA Code titles in which you have an interest, to david.cox@wsaa.asn.au. USING THE HARD COPY VERSION OF THE CODE As you read through the Code, you will note that a bold vertical line appears in the left-hand margin beside some clauses and paragraphs or parts thereof. The line indicates that there has been an amendment made by Hunter Water to that particular paragraph or clause of the WSAA edition i.e. material has been modified, added and/or deleted. Where a short vertical marginal line appears beside a space or blank line between paragraphs or clauses, it signifies that material has been deleted at that point. Page 9 of 37

10 nominated Product Specification. The declaration should be additional to the default quality assurance requirement for the product. Packaging, Transportation and Delivery A suffix -V has been added to any WSAA Standard Drawing modified or varied by Hunter Water and a suffix -H on the drawing number denotes an added or new Hunter Water drawing (Refer Clauses HW 25.3 and HW 25.4). Product Specifications do not specify packaging, transportation and delivery requirements. It is deemed that the supplier is responsible for ensuring that products are not damaged in any way by packaging, transportation and unloading at the purchaser s nominated deliv ery location. It is assumed that purchaser s procurement processes address this requirement. Products and Material Information and Guidance Products and material information and guidance have been developed to assist Designers in specifying the most suitable products and materials for constructing water and sewerage networks and to help Constructors understand relevant aspects of installation of the different pipeline systems and their components. Water Industry Standards Where there are no acceptable published standards that can be referenced by a Product Specification, WSAA may form a working group, in conjunction with other stakeholders such as industry associations, product suppliers etc., to develop a suitable standard. The format of Water Industry Standards will be similar to that of other published standards. Water Industry Standards have been placed on the WSAA website for ease of access and to enable regular updating and improvements. Each Standard is freely downloadable. It is anticipated that Water Industry Standards will be revised over the life of this edition to reflect advice from conformity assessment bodies, specifiers and users. Similarly, additional Water Industry Standards may be published. NATIONAL STANDARD FOR CONSTRUCTION WORK Source: uments/243/nationalstandardforconstructionwork_nohsc _pdf.pdf The National Standard for Construction Work [NOHSC:1016 (2005)] applies to: (a) (b) (c) (d) (e) (a) clients and designers of construction projects; persons with control of a construction project; persons with control of construction work; persons engaged to undertake construction work; and construction sites; but does not apply to owners and/or occupiers of dwellings personally performing construction work on those dwellings. The WHS Acts in each jurisdiction place duties on a range of person, whereby a person may find they have duties under several headings, e.g. a person may have control of the construction project and of carrying out certain construction work. NOTE: Australian governments have agreed that a model WHS Act will be adopted into law by all states, territories and the Commonwealth by end of USING THE ELECTRONIC VERSION OF THE CODE As with the hard copy of the Code, a bold vertical black line in the left-hand margin beside (or between) some paragraphs and clauses indicates that there is a Hunter Water variation to that particular part of the Code i.e. material has been modified, added and/or deleted. In addition to the marginal marking, modified and/or added text appears in a violet coloured font. If you utilise any hyperlink within the documents, choose the Previous View (not Previous Page ) button to return to where you were when you first activated the hyperlink. In addition to modified or added Hunter Water drawings having a suffix (-V or H) on the drawing number, such drawings also appear on screen in a violet colour. CONDITIONS OF SUPPLY The Sewerage Code of Australia (Hunter Water Edition) and Water Supply Code of Australia (Hunter Water Edition) described below as the Codes are supplied subject to the following conditions and understandings: i. The Codes are copyright and apart from any use as permitted under the Copyright Act 1968, no parts of the documents may be sold, reproduced, stored in a retrieval system or transmitted in any form or by any means without the prior permission in writing of Hunter Water. ii. iii. iv. The Codes are intended for use in connection with Hunter Water related projects only. Hunter Water accepts no responsibility for the incorrect application of the Codes. Hunter Water does not warrant the applicability of the Codes in areas outside Hunter Water s area of operations. v. The purchaser acknowledges that the Codes may contain errors and/or omissions. vi. vii. viii. ix. Hunter Water accepts no responsibility for any works or parts thereof which may contain design and/or construction defects due to errors or omissions in any part of the Codes. Amendments to the Codes will be sent to the address notified at the time of initial purchase or any subsequent address notified by the purchaser. The purchaser will be responsible at all times for maintaining an accessible address. The purchaser of the Codes must promptly acknowledge receipt of all amendments issued and attach all amendments to their copy/copies of the Codes. The purchaser acknowledges and accepts that the general information (non -financial information) supplied to WSAA, will be shared with Hunter Water for the purposes of managing and maintaining a database of customer details and to administer amendments. These duties cannot be contracted out to a third party. Page 10 of 37

11 Examples of persons involved in construction work with an obligation under the proposed NOHSC include: (a) (b) (c) (d) (e) (f) (g) designers, including planners, structural engineers, architects, design draftspersons; owners, property developers, clients; occupiers, local councils, utility authorities; principal contractors, sub-contractors, builders, tradesmen, civil contractors; employers, labour hire companies; employees, self-employed; and suppliers of material. The NOHSC Safe Design Guideline provides information on applying the principles of safe design to buildings and other construction work. The Designer s report to the client should include details of any hazardous structural features, material, procedures or practices that remain in the design, and whether these hazards, or the risks arising from these hazards, could be eliminated by design modifications, or substitute materials or methods. Depending on the nature and scale of the installation Hazard and Operability (HAZOP) review(s) may be used during the design process. Construction Hazard Assessment Implication Reviews (CHAIRs) should also be carried out to identify potentially dangerous situations during construction and either design them out or anticipate the hazards and mitigate the risks by modifying the design. The CHAIR can also be used to identify opportunities for adjusting the design to suit construction methodology and perhaps realise some cost savings. Value Management workshops can assist in eliminating over design caused by duplication and unnecessarily high specification and identify potential cost savings through efficiencies. PROPOSED AMENDMENTS WSAA invites users of this Code and its supporting documentation to propose amendments. An amendment proforma can be downloaded from To increase the likelihood of suggested amendments being adopted, it is recommended that users of the Code seek preliminary review by and support of a WSAA Member or Associate or other relevant organisation, for example, CSIRO, Civil Contractors Federation or PIPA for inclusion with the submission. Amendments will be published from time to time on the WSAA website. Users may register their interest so that published amendments can be ed directly. To register, please submit your name, position, company and contact details, together with the WSAA Code titles in which you have an interest, to codes@wsaa.asn.au. USING THE ELECTRONIC VERSION OF THE CODE As you read through the Code, you will note that a bold vertical line appears in the left -hand margin beside some clauses and paragraphs or parts thereof. The line indicates that there has been an amendment made by Hunter Water to that particular paragraph or clause of the WSAA edition i.e. material has been modified, added and/or deleted. Where a short vertical mar ginal line appears beside a space or blank line between paragraphs or clauses, it signifies that material has been deleted at that point. Page 11 of 37

12 Provided the requirements of the Code as they appear in the Hunter Water Edition are followed, it is not necessary that you understand what changes or where such changes to the WSAA edition have been made. I Glossary of terms Delete existing clause Insert new clause as follows: The purpose of this glossary is to assist in interpreting terminology used in the various parts of the Water Supply Code of Australia. The terms and definitions are adopted from various sources including: Australian/New Zealand Standard AS/NZS , Buried flexible pipelines Part 1: Structural design British Standard BS EN 805:2000, Water supply Requirements for systems and components outside buildings British Standard BS EN 14040:2006, Environmental management. Life cycle assessment. Principles and framework Glossary of Building Terms published jointly by National Committee on Rationalised Building (NCRB), Standards Australia and Suppliers Index Pty Ltd Australian/New Zealand Standard AS/NZS 3500 National Plumbing and Drainage Code Part 0: Glossary of terms A Guide to Testing of Water Supply Pipelines and Sewer Rising Mains, 1 st Edition, June 1999, WRc plc The Drinking Water Dictionary, 1 st Edition, 2000, American Water Works Association (AWWA) Water Agency documentation The purpose of this glossary is to assist in interpreting terminology used in the various parts of the Water Supply Code of Australia. The terms and definitions are adopted from various sources including: Australian/New Zealand Standard AS/NZS , Buried flexible pipelines Part 1: Structural design British Standard BS EN 805:2000, Water supply Requirements for systems and components outside buildings Glossary of Building Terms published jointly by National Committee on Rationalised Building (NCRB), Standards Australia and Suppliers Index Pty Ltd Australian/New Zealand Standard AS/NZS 3500 National Plumbing and Drainage Code Part 0: Glossary of terms A Guide to Testing of Water Supply Pipelines and Sewer Rising Mains, 1 st Edition, June 1999, WRc plc The Drinking Water Dictionary, 1 st Edition, 2000, American Water Works Association Water Agency documentation Page 12 of 37

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28 II Abbreviations Delete existing clause Insert new clause as follows: Page 28 of 37

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31 III Referenced Documents Delete existing clause Insert new clause as follows: The following documents are referred to in this Code. The latest version of the Standard including published amendments applies, except where specific sections, figures or clauses are referenced, in which case the year of publication is stated in the text. The following documents are referred to in this Code. Page 31 of 37

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35 Delete Clause IV Other References IV OTHER REFERENCES The following documents are published on the WSAA website. While not necessarily specifically referred to in this Code, they may be used in process documentation permitting the adoption of this Code and/or preparation of Contract documentation. The list of documents is not complete as other documents may be published from time to time. Page 35 of 37

36 Hunter Water Product Specifications have been adapted from the WSAA Product Specifications to reflect Hunter Water s specific requirements for particular products and can be accessed on the Hunter Water website at Page 36 of 37

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