Page 1 of 5 Title Install and maintain water mains and water supply systems and reticulation Level 4 Credits 8 Purpose This unit standard is for people who work in the plumbing industry. People credited with this unit standard are able to: excavate and prepare the base for water mains; install and commission water mains; position and install water supply systems and reticulation; describe treatment methods for water purification of privately-owned water supply systems; maintain water mains and water supply systems and reticulation; work safely and with care; and demonstrate knowledge of regulatory requirements, selection of methods and materials, and the concepts of hydrostatics and hydraulics, as applied to the installation and maintenance of water mains and water supply systems and reticulation. Classification Plumbing, Gasfitting and Drainlaying > Plumbing Available grade Achieved Prerequisites Current drainlaying certificate or licence as issued under the Plumbers, Gasfitters, and Drainlayers Act 2006; and Unit 1099, Excavate and trench for plumbing, gasfitting, or drainlaying; or demonstrate equivalent knowledge and skills. Guidance Information 1 Legislation, standards, and codes applicable to this unit standard include but are not limited to: Plumbers, Gasfitters, and Drainlayers Act 2006; Health and Safety in Employment Act 1992; Building Act 2004; Plumbers, Gasfitters, and Drainlayers Regulations 1977; Water Supplies Protection Regulations 1961; AS/NZS 3500.1:2003 Plumbing and drainage Water services; NZS 3604:1999 Timber Framed Buildings; NZS 4302:1987 Code of practice for the control of hygiene in air and water systems in buildings; NZS 5807:1980 Code of practice for industrial identification by colour, wording or other coding; available at http://www.standards.co.nz;
Page 2 of 5 New Zealand Building Code, Clause G10 Piped Services, and Clause G12 Water Supplies, current versions and any related compliance documents, available at http://www.dbh.govt.nz. May include: Health Act 1956. Any legislation, standard, or code superseding any of the above will apply, pending review of this unit standard. 2 This unit standard relates to both reticulated network authority mains and selfcontained water supply systems. Self-contained water supply systems may refer to private water collection or bore and distribution systems. 3 Range jointing compression, crimped, crox, flange, fusion weld, gibault, glued, rush pit, screwed, threaded; water mains fittings hydrants, valves; water mains structures anchor blocks, thrust blocks. 4 This unit standard requires the application of theory as included in the Plumbers, Gasfitters, and Drainlayers Regulations 1977. These Regulations are currently under review to align them with the newer Plumbers, Gasfitters, and Drainlayers Act 2006. 5 Definitions Job requirements refers to specific requirements of the job at hand not covered by job specifications. Job specifications, for the purpose of this unit standard, refers to instructions (oral, written, graphic) and may include any of the following: manufacturers instructions; design drawing detail specifications; specifications from a specialist source such as an architect, designer, engineer, or a supervisor; and site or work specific requirements. Where job specifications are in conflict with applicable legislation, standards, and/or codes, such legislation, standards, and/or codes shall take precedence for the purpose of assessment. Maintain may refer to all or any of repair, upgrade, alter, remove. Other services refers to any existing installed services. Water mains refers to water mains and associated fittings and structures; Water supply systems and reticulation refer to water collection, storage, and distribution pipework to buildings, and to metering equipment. Regulatory requirements, for the purpose of this unit standard, refers to applicable legislation, standards, and codes. Outcomes and performance criteria Outcome 1 Excavate and prepare the base for water mains. 1.1 Position for water mains is located in accordance with job specifications. 1.2 Excavation is carried out in accordance with job specifications.
Page 3 of 5 1.3 Stable sub-base is identified in accordance with visual assessment and job specifications. 1.4 Base material is selected, prepared, and levelled in accordance with site conditions and job specifications. Outcome 2 Install and commission water mains. 2.1 Water mains are constructed and associated fittings are installed in accordance with job specifications. 2.2 Water mains, hydrants, thrust blocks, and valves are installed and connected to connections and discharge points in accordance with job specifications. 2.3 Water mains are identified by label and/or colour in accordance with relevant standards and codes. 2.4 Water mains and associated fittings are commissioned and operate to design function. 2.5 The installation meets requirements of the Building Act 2004. Outcome 3 Position water supply systems and reticulation. 3.1 Water supply systems are positioned in accordance with intended use. 3.2 Water supply systems are positioned to measurements in accordance with job specifications and relevant standards and codes. 3.3 Water supply systems are positioned to prevent contamination and/or damage in accordance with job specifications and relevant standards and codes. Outcome 4 Install water supply systems and reticulation. 4.1 Water supply systems are installed in accordance with job specifications and relevant standards and codes. 4.2 Water supply systems are connected to connection and termination points in accordance with job specifications and relevant standards and codes.
Page 4 of 5 4.3 Water supply systems are tested for soundness in accordance with job specifications and relevant standards and codes. 4.4 Water supply systems and pipelines are identified by label and/or colour and direction of reticulated flow in accordance with relevant standards and codes. 4.5 The installation meets requirements of the Building Act 2004. Outcome 5 Describe treatment methods for water purification of privately-owned water supply systems. Range chemical, distillation, filtration, straining, UV lighting. 5.1 Treatment methods for water purification of privately-owned water supply systems are described in accordance with relevant standards and codes. Outcome 6 Maintain water mains and water supply systems and reticulation. 6.1 Water mains and water supply systems and reticulation are assessed in accordance with maintenance requirements. 6.2 Faults are identified in terms of causes and means of rectification. 6.3 Faults are rectified in accordance with maintenance requirements, job specifications, and relevant standards and codes. Outcome 7 Work safely and with care. 7.1 Practical activities are carried out avoiding harm to people and damage to property, other services, materials, tools, and equipment. Outcome 8 Demonstrate knowledge of regulatory requirements, selection of methods and materials, and the concepts of hydrostatics and hydraulics, as applied to the installation and maintenance of water mains and water supply systems and reticulation.
Page 5 of 5 8.1 Applicable sections of legislation, standards, and codes are described in terms of their application to the installation and maintenance of water mains and water supply systems and reticulation. 8.2 Selection of methods and materials is justified. Range job specifications, operation of the installed system and components; may include job requirements. 8.3 The concepts and principles of hydrostatics and hydraulics are explained in terms of their application to the installation and maintenance of water mains and water supply systems and reticulation. Replacement information This unit standard was replaced by unit standard 30614 and unit standard 30615. This unit standard replaced unit standard 2145, unit standard 2160, and unit standard 2161. This unit standard is expiring. Assessment against the standard must take place by the last date for assessment set out below. Status information and last date for assessment for superseded versions Process Version Date Last Date for Assessment Registration 1 25 October 2007 31 December 2022 Review 2 26 October 2017 31 December 2022 Consent and Moderation Requirements (CMR) reference 0003 This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do. Please note Providers must be granted consent to assess against standards (accredited) by NZQA, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment. Industry Training Organisations must be granted consent to assess against standards by NZQA before they can register credits from assessment against unit standards. Providers and Industry Training Organisations, which have been granted consent and which are assessing against unit standards must engage with the moderation system that applies to those standards. Requirements for consent to assess and an outline of the moderation system that applies to this standard are outlined in the Consent and Moderation Requirements (CMR). The CMR also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements.