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: interpreting plans and specifications rainfall analysis sizing and documenting layout of rainwater harvesting systems for residential, commercial and industrial applications to include water treatment and backflow protection of drinking and non-drinking water supply systems may be for new projects or an existing structure being renovated, extended, restored or maintained. |
Design requirements must include: | architectural plans building specifications owner requirements pipework identification sizing of pipework backflow protection of drinking and non-drinking water supply systems water treatment specialist water use applications. |
Contamination may include: | bacterial heavy metal inorganic odour organic taste silt viral vermin. |
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 project may include: design styles energy costs expected design life labour costs material costs safety factors speed of installation suitable materials. |
Statutory, regulatory requirements and relevant Australian standards and codes include: | Acts and regulations, commonwealth, state or territory and local government requirements AS/NZS3500 National plumbing and drainage AS2200 Design charts for water supply and sewerage National Construction Code. |
Manufacturer requirements may include: | material specifications pipe sizing pump installation storage system technical and trade manuals other relevant documents. |
Desktop study may include collection and interpretation of data for design purposes in: | architectural and building plans developer plans manufacturer data other documents, which may include: applications brochures forms policies other reports as available. |
Performance requirements must include: | compliance limits for: bacteria levels nutrients pH silt control vermin protection overflow discharge requirements requirements established using relevant Australian standards, codes and local authority plans, including: cover discharge flow conditions pipe grades. |
Tank type and location may include: | tank type: concrete fibreglass metal polymer other approved materials tank location may include: above-ground in-ground. |
Layout of pipework systems: | may include: gravity systems pumped systems should not unduly affect building integrity and aesthetic appeal should have principles of economy, serviceability, durability and fit for use. |
Fittings, valves and controls include: | backflow prevention devices inspection openings irrigation control systems isolating valves level indicators pump controls. |
First-flush systems may include: | electronic float-activated mechanical volume-activated. |
Filtration systems may include: | overflow devices sand screens settlement tanks strainers. |
Water contamination solutions may include: | disinfection ultraviolet. |
Pipe size calculations must include: | determination of flow interpretation of design charts and tables pipe sizing calculations reduced level calculations. |
Materials may include: | copper (Cu) polyethylene (PE) polypropylene (PP) polybutylene (PB) unplasticised polyvinyl chloride (PVC-U) other approved material. |
Jointing methods may include: | brazing compression joints electrofusion welding mechanical joints solvent cement threading other approved jointing methods. |
Pipe supports may include: | anchors bedding bracket spacing concrete support corrosion protection manufacturer-recommended specific fixings material requirements provision for expansion saddles. |
Pump and ancillary requirements may include: | automatic controls pump duties corrosion-resistant materials level controls and alarms pump selection and pump sizing, based on: flow velocity lift probable simultaneous demands. |
Installation requirements may include: | pipe protection, which may include: cover corrosion impact fire rating level of workmanship manufacturer-recommended specific fixings pipe support provision for expansion serviceability and access. |
Rainwater reuse systems must include: | roof water collection storage may include: tanks open in-ground (dam) water treatment pumps approved drinking and non-drinking use. |
Sustainability principles and concepts: | cover the current and future social, economic and environmental use of resources may include: efficient use of material efficient energy use/capital outlay comparison water use evaporation local environment consideration overflow disposal/reuse consideration of the Green Building Council of Australia rating scheme selecting appropriate components to ensure minimal environmental impact. |
Plans: | may include: axonometrics cross-sections details elevations isometrics schematics may be produced using: computer generation drawing equipment. |
Specification may include: | backflow prevention flow requirements jointing manufacturer requirements materials residual pressures safety (WHS) specialised components storage support testing valve selection water treatment workmanship. |
Testing must include: | air pressure backflow protection defect inspection drainage inspection hydrostatic performance: flow pressure water quality quality assurance (QA) audit. |
Commissioning schedule must include: | balancing disposal system flow and pressure adjustments leak check pressure test pump settings safety requirements system certification system defects system flushing system functions as per design system purge valve operation ventilation vermin control. |
Operation and maintenance manual may include: | as installed drawings certification documentation maintenance schedules manufacturer brochures ongoing maintenance requirements pump maintenance regular inspections results of commissioning test safety management system system detail, setting and operations valve function system operational parameter adjustments and checks, including: disinfection first flush devices pH silt control suspended solids water quality. |