The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included. |
Scope of work: | must include interpretation of plans and specificationsmust include sizing and documenting layout of complex cold water systems for applications, including residential, commercial, industrial and healthmay be for new projects or an existing structure being renovated, extended, restored or maintained. |
Design requirements may include: | architectural plansbuilding specificationseffect of water quality on pipework, plant and equipmentowner requirementspipework and valve identificationsoil qualityspecialist water use applicationsunstable or water-charged ground. |
Cost-benefit analysis: | compares the range of suitable materials and system choices available to enable cost-effective choices to be made without compromising the integrity of the projectmay include:expected design lifelabour costsmaterial costssafety factorsspeed of installationsuitability of materialssystem choices. |
Statutory and regulatory requirements may include: | local and state government requirementspreparation of documentation for authorities’ approvalrequirements of Acts and regulations. |
Australian standards and codes may include: | AS/NZS3500 National plumbing and drainage AS2200 Design charts for water supply and sewerageNational Construction Codestate or territory requirementsother relevant Australian standards or codes. |
Manufacturer requirements may include: | flow and pressure requirements for fixtures and appliancesmaterial specificationspump tablessizing tablesrecommended specific fixings for pipeworktechnical and trade manuals. |
Desktop study may include collection and interpretation of existing data for design purposes, such as: | architectural and building plansmanufacturers’ datadeveloper plansdocuments, which may include:applicationsbrochuresforms policiesother reports as available. |
Flow and pressure tests must include: | on-site measurement of flow (l/s), velocity (m/s) and pressure (kPa)interpretation of flow and pressure tests conducted by a contractor. |
Performance requirements may include: | flow, velocity, pressure and discharge requirements, established using relevant Australian standards, codes, and state, territory and local government authorities’ plans. |
Layout of pipework systems may include: | principles of economy, serviceability, durability and fit for usedual feedgravity feedmain pressurepumped systemring main. |
Fittings and valves may include: | fittings:bendselbowsteesunionsvalves:backflow preventionexcess pressureisolatingpressure limitingpressure reductionstrainers. |
Backflow prevention devices may include: | registered break tank (RBT)registered air gap (RAG)double-check valve assembly (DCV)dual-check valve with intermediate vent (DuCV)reduced pressure detector assembly (RPDA)reduced pressure zone device (RPZD)other approved devices. |
Flush valve system types may include: | backflow prevention requirementsgravitymains pressurepipe sizing requirementsstorage requirements. |
Cold water system components may involve: | meter assemblies that may be:direct and indirectelectronicinferentialmagneticthrust blocks and their design elements, including:design details for tees, elbows and valveskeying and anchorage pointssizessoil characteristicsvelocity and flow forces to be resistedpipe supports, including:anchorsbeddingbracket spacingcorrosion protectioncoverhanging bracketsmanufacturer-recommended specific fixingsmaterial requirementsprovision for expansionsaddleswall and ceiling bracketswater storage systems, including:air gapautomatic controlsdrain down provisioninlet valve design and sizingoutlet sizingoverflow requirementsprovision to maintain service while cleaningprovision to maintain service while servicingsafe tray requirementstank accesstank maintenancetank sizeswater treatment, including:filtrationreverse osmosis (RO)softening. |
Pump, pump controls and pumproom requirements must include: | acoustic performanceautomatic changeoverautomatic controlsdrain down provisiondual pump provisionimpeller sizinginlet and outlet design requirementsinstallation and mounting requirementspressure gaugespump selectionpump sizingspace requirementsvalve requirementsvariable speed control. |
Materials may include: | acrilonitrile butadiene styrene (ABS)composite pipeworkcopper (Cu)cross-linked polyethylene (PE-X)polypropylene (PP)polybutylene (PB)ductile iron cement lined (DICL)other approved materialsfittings and fixturesprotective coatings. |
Jointing methods may include: | brazingcompressionelectrofusion weldingflaringmechanical jointsrubber ring jointsscrewingsolderingsolvent cement weldingother approved jointing methods. |
Installation requirements must include: | beddingfire rating of penetrationsclippinginstallation detailsjointing requirementslevel of workmanshipmanufacturer-recommended specific fixingspipe support. |
Delivery systems may include: | constant flow variable speed pumpsgravity feedhydropneumaticmains pressure system. |
Sustainability principles and concepts: | cover the current and future social, economic and environmental use of resourcesmay include:selecting appropriate material to ensure minimal environmental impactefficient use of materialefficient energy usage/capital outlay comparisoneffect on the environment due to overflow or leakagewater efficiencyconsideration of the Green Building Council of Australia rating scheme. |
Plans: | may include:axonometricscross-sectionsdetailselevationsisometricsschematicssectionsmay be produced using:computer generationdrawing equipment. |
Specification may include: | beddingflow requirementsjointingmanufacturer requirementsmaterialsresidual pressuressafety (WHS)specialised componentssupporttestingvalve selectionwater treatmentworkmanship. |
Testing may include: | air pressure defect inspectionhydrostatic mains pressure performancequality assurance (QA) audit. |
Commissioning schedule may include: | disinfectionflow testleak checkpressure testsystem certificationsystem defectssystem functions as per designsystem purgevalve operation. |
Operation and maintenance manual may include: | as installed drawingscertification documentationmaintenance schedulesmanufacturer brochures and technical informationresults of commissioning testvalve function. |