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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: | includes:interpretation of plans and specificationssizing and documenting layout of complex sanitary plumbing and drainage systems for applications, including residential, commercial and industrialmay be for:existing structure being renovated, extended, restored or maintainednew projects. |
Design requirements may include: | architectural specificationsbuilder specificationsowner requirementsspecialist water use applications. |
Cost-benefit analysis may include: | comparison of range of suitable materials and system choices available to enable cost-effective choices to be made without compromising integrity of the project. |
Statutory and regulatory requirements include: | Acts and regulationslocal and state government policies. |
Australian and New Zealand standards may include: | AS/NZS3500 National plumbing and drainage set: Parts 1.1 and 1.2AS2200 Design charts for water supply and sewerageBuilding Code of Australia. |
Manufacturer requirements may include: | material specificationspump tablessizing tablestechnical and trade manuals. |
Performance requirements include: | flow, velocity, pressure and discharge requirements, established using Australian and New Zealand standards and local authority plans. |
Layout of pipework systems may include: | dual feedring mainsingle pipe. |
Fittings and valves may include: | fittings:bendselbowsteesunionsvalves:backflow preventionexcess pressureisolatingpressure limitingpressure reductionstrainers. |
Manhole details may include: | benching requirementsconnections to and fromflowgradient requirementsinspection chamberslidsopen and closed channelsizing. |
Gullies can cover details such as size, location, bedding and concrete support, and also include: | boundary trapsdisconnector gullies (DG)overflow relief gullies (ORG). |
Calculations for complex sanitary plumbing and drainage systems may include: | determination of flow and fixture loadingsgradient calculationsinterpretation of design charts and tablespipe sizing calculationsreduced level calculations. |
Anchor blocks design elements may include: | flow forces to be resistedkeying and anchorage pointssizessoil characteristics. |
Pipe fixings may include: | anchorsbeddingbracket spacingconcrete supportcorrosion protectioncoverhanging bracketsmaterial requirementssaddleswall and ceiling brackets. |
Pumpwell, pump and pump control requirements may include: | automatic controlscapacitychainscorrosion-resistant materialsdetailinghigh and low-level water controls and alarmsimpeller sizinginlet and outlet design requirementsinstallation and mounting requirementsladder accessmacerator requirementspump selectionpump sizingpumpwell sizingspace requirementsstep ironsvalve requirementswarning system. |
Materials include: | cast ironconcretecopperearthenwarehigh density polyethylene (HDPE)unplasticised polyvinyl chloride (PVC-U)fittings and fixtures, including:measures to prevent the spread of firesound attenuation requirements. |
Jointing methods may include: | brazing and threadinggluingmechanical jointsrubber ringsolvent cement welding. |
Installation requirements include: | beddingclippingconcrete supportinstallation detailsjointing requirementslevel of workmanship. |
Rising main systems may include: | approved pressure pipe and fittingscalculated rise and pump delivery requirementspump sizing to meet calculated flow conditions. |
Plans: | may include:axonometricscross-sectionsdetailselevationsisometricsschematicssectionsmay be produced using:computer generationIndian inkpencilpigment liner. |
Specification may include: | beddingclippingconcrete support and detailing specialised componentsjointingmanholesmanufacturer requirementsmaterialsworkmanship. |
Testing may include: | air pressure testdrainage inspectionhydrostatic testquality assurance (QA) audit. |
Commissioning schedule may include: | charging trapschecking leakscleaning grates. |
Operation and maintenance manual may include: | check for blockagesleak detectionpump maintenancewater auditingyearly inspectionyearly maintenance requirements. |