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 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 plansbuilding specificationsfire rating of penetrationsowner requirementspipework identificationsoil qualityspecialist waste 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 integrity of the projectmay include:design stylesexpected design lifelabour costsmaterial costssafety factorsspeed of installationsuitability of materialssystem choices. |
Statutory and regulatory requirements may include: | Acts and regulationslocal and state government requirementspreparation of documentation for authorities’ approval. |
Australian standards and codes may include: | AS/NZS3500 National plumbing and drainagestate or territory requirementsNational Construction Codeother relevant Australian standards and codes. |
Manufacturer requirements may include: | material specificationspump tablessizing tablesrecommended specific fixings for pipeworktechnical and trade manuals. |
Desktop study may include collection and interpretation of data for design purposes, such as: | architectural and building plansdeveloper plansmanufacturers’ datadocuments, which may include:applicationsbrochuresformspoliciesother reports as available. |
Performance requirements must include: | flow, velocity, pressure and discharge requirements, established using relevant Australian standards, codes and local authority plans. |
Layout of pipework systems: | will be based on principles of economy, serviceability, durability and fit for usemay include:drainageelevated pipeworklow pressure pumpvacuumvented stack systems. |
Fittings and valves may include: | bendsjunctionsair admittance valvesreflux valvesinspection openingsexpansion joints. |
Access chamber details may include: | benching requirementsflowgradient requirementsinlet and outlet connections ladder accesslidsopen and closed channelsizing. |
Gullies can cover details such as size, location, bedding and concrete support, and also include: | boundary trapsdisconnector gullies (DG)floor waste (FW)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 calculationsself-cleaning velocities. |
Anchor blocks design elements may include: | flow forces to be resistedkeying and anchorage pointssizessoil characteristics. |
Pipe supports may include: | anchorsbeddingbracket spacingconcrete supportcorrosion protectioncoverhanging bracketsmanufacturer-recommended specific fixingsmaterial requirementsprovision for expansionsaddleswall and ceiling brackets. |
Pumpwell, pump and pump control requirements may include: | access coversautomatic controlscapacitychainscorrosion-resistant materialsdetailingemergency storagehigh and low-level water controls and alarmsimpeller sizinginlet and outlet design requirementsinstallation and mounting requirementsladder accessmacerator requirementsodour controlpump selectionpump sizingpumpwell sizingspace requirementsstep ironsvalve requirementsventilationwarning system. |
Materials may include: | cast iron (CI)concretecopper (CU)earthenware (VCP)high density polyethylene (HDPE)unplasticised polyvinyl chloride (PVC-U)other approved materialfittings and fixtures, including:measures to prevent the spread of firesound attenuation requirements. |
Jointing methods may include: | brazing and threadingelectrofusion weldingmechanical jointsrubber ringsolvent cement welding. |
Installation requirements must include: | beddingclippingconcrete supportfire rating of penetrationsinstallation detailsjointing requirementslevel of workmanship. |
Rising main systems may include: | approved pressure pipe and fittingscalculated rise and pump delivery requirementspipe velocitiespump sizing to meet calculated flow conditions. |
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 schemelocal environment consideration regarding overflow, disposal and reuse. |
Plans: | may include:axonometricscross-sectionsdetailselevationsisometricsschematicssectionsmay be produced using:computer generationdrawing equipment. |
Specification may include: | beddingcommissioningconcrete support and detailing specialised componentsjointingaccess chambers (manholes)manufacturer requirementsmaterialspumpssafety (WHS)supporttestingworkmanship. |
Testing may include: | air pressure drainage inspectionhydrostaticperformancequality assurance (QA) audit. |
Commissioning schedule may include: | charging trapschecking leakschecking for foreign materialchecking for system defectschecking that system functions as per designchecking trap water seal retentioncleaning gratessystem certification. |
Operation and maintenance manual may include: | construction drawingsresults of commissioning testcertification documentationmaintenance schedulesmanufacturer brochures and technical informationmanufacturer warranties. |