NWPNET044
Test and commission water distribution systems


Application

This unit of competency describes the skills required to plan and implement the testing and commissioning of water distribution systems. The ability to interpret technical information, identify and assess hazards and perform technical testing procedures is essential to performance.

This unit applies to those working as field staff and operators with specific responsibility for commissioning water distribution systems, post-installation or repair, and for ensuring that the functioning of the system complies with relevant specifications and organisational requirements.

The skills and knowledge described in this unit must be applied within the legislative, regulatory and policy environment in which they are carried out. Organisational policies and procedures must be consulted and adhered to, particularly those related to WHS.

Those undertaking this unit would work under indirect supervision, while performing routine tasks, in a familiar context, ensuring minimum damage to the environment.

No licensing, legislative or certification requirements apply to unit at the time of publication.


Elements and Performance Criteria

ELEMENTS

PERFORMANCE CRITERIA

Elements describe the essential outcomes

Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold italicised text is used, further information is detailed in the range of conditions section.

1. Plan and prepare for testing and commissioning

1.1 Check plans to locate features and the section to be tested.

1.2 Identify and interpret the system operation requirements.

1.3 Check and schedule vacuum testing and commissioning tasks.

1.4 Identify and assess potential hazards and take required preventative measures.

1.5 Select and use tools and equipment.

1.6 Check testing equipment for accuracy and identify and correct malfunctions.

2. Maintain water system hygiene

2.1 Arrange disinfection.

2.2 Clean the relevant section of the distribution system.

2.3 Dispose of flushing.

3. Test the pipeline system

3.1 Test equipment by determining the correct test pressure for the pipeline and by fitting gauges of the correct range.

3.2 Locate and report failed pipes, joints and fittings and reschedule testing.

3.3 Vacuum test concrete access chambers.

4. Commission the distribution system

4.1 Ensure the distribution system is operational.

4.2 Check, maintain and store equipment, tools and materials.

4.3 Restore the work site.

5. Record and report results

5.1 Maintain workplace and calibration records and certificates.

5.2 Collect and store all testing and compliance results.

Evidence of Performance

Evidence required to demonstrate competence must satisfy all of the requirements of the elements and performance criteria. The candidate must be assessed using one or more cleaning techniques listed in the Range of Conditions. If not otherwise specified the candidate must demonstrate evidence of performance of the following on at least one occasion.

interpreting and applying a range of technical documents

conducting test procedures

monitoring work processes and ensuring safe work practices

testing pipes

identifying system faults

testing and commissioning water distribution systems

planning the testing of water distribution systems

identifying and analysing system requirements

identifying and addressing hazards

using suitable protective equipment

maintaining the quality of water in the system

commissioning the distribution system

restoring worksite and equipment

completing required reports and records


Evidence of Knowledge

Evidence required to demonstrate competence must satisfy all of the requirements of the elements and performance criteria. If not otherwise specified the depth of knowledge demonstrated must be appropriate to the job context of the candidate.

general WHS on work sites

the risk factors and potential hazards of test procedures

water hygiene and system disinfection requirements

equipment operation

environmental aspects of test procedures

characteristics of pipes, materials and fittings

an overview of the water distribution system and water industry operations

relevant definitions, terminology, symbols and language

testing methods used for water distribution systems


Assessment Conditions

Competency should be assessed in an actual workplace or in a simulated environment, with access to equipment and infrastructure appropriate to the outcome. Competency should be demonstrated over time to ensure the candidate is assessed across a variety of situations.

Assessors must satisfy the NVR/AQTF mandatory competency requirements for assessors.


Foundation Skills

The foundation skills demands of this unit have been mapped for alignment with the Australian Core Skills Framework (ACSF). The following tables outline the performance levels indicated for successful attainment of the unit.

Further information on ACSF and the foundation skills underpinning this unit can be found in the Foundation Skills Guide on the GSA website.


Range Statement

Cleaning techniques include:

flush

slug

swab


Competency Field

Networks