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 specifications must include sizing and documenting layout of complex cold water systems for applications, including residential, commercial, industrial and health may be for new projects or an existing structure being renovated, extended, restored or maintained. |
Design requirements may include: | architectural plans building specifications effect of water quality on pipework, plant and equipment owner requirements pipework and valve identification soil quality specialist water use applications unstable 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 project may include: expected design life labour costs material costs safety factors speed of installation suitability of materials system choices. |
Statutory and regulatory requirements may include: | local and state government requirements preparation of documentation for authorities’ approval requirements of Acts and regulations. |
Australian standards and codes may include: | AS/NZS3500 National plumbing and drainage AS2200 Design charts for water supply and sewerage National Construction Code state or territory requirements other relevant Australian standards or codes. |
Manufacturer requirements may include: | flow and pressure requirements for fixtures and appliances material specifications pump tables sizing tables recommended specific fixings for pipework technical and trade manuals. |
Desktop study may include collection and interpretation of existing data for design purposes, such as: | architectural and building plans manufacturers’ data developer plans documents, which may include: applications brochures forms policies other 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 use dual feed gravity feed main pressure pumped system ring main. |
Fittings and valves may include: | fittings: bends elbows tees unions valves: backflow prevention excess pressure isolating pressure limiting pressure reduction strainers. |
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 requirements gravity mains pressure pipe sizing requirements storage requirements. |
Cold water system components may involve: | meter assemblies that may be: direct and indirect electronic inferential magnetic thrust blocks and their design elements, including: design details for tees, elbows and valves keying and anchorage points sizes soil characteristics velocity and flow forces to be resisted pipe supports, including: anchors bedding bracket spacing corrosion protection cover hanging brackets manufacturer-recommended specific fixings material requirements provision for expansion saddles wall and ceiling brackets water storage systems, including: air gap automatic controls drain down provision inlet valve design and sizing outlet sizing overflow requirements provision to maintain service while cleaning provision to maintain service while servicing safe tray requirements tank access tank maintenance tank sizes water treatment, including: filtration reverse osmosis (RO) softening. |
Pump, pump controls and pumproom requirements must include: | acoustic performance automatic changeover automatic controls drain down provision dual pump provision impeller sizing inlet and outlet design requirements installation and mounting requirements pressure gauges pump selection pump sizing space requirements valve requirements variable speed control. |
Materials may include: | acrilonitrile butadiene styrene (ABS) composite pipework copper (Cu) cross-linked polyethylene (PE-X) polypropylene (PP) polybutylene (PB) ductile iron cement lined (DICL) other approved materials fittings and fixtures protective coatings. |
Jointing methods may include: | brazing compression electrofusion welding flaring mechanical joints rubber ring joints screwing soldering solvent cement welding other approved jointing methods. |
Installation requirements must include: | bedding fire rating of penetrations clipping installation details jointing requirements level of workmanship manufacturer-recommended specific fixings pipe support. |
Delivery systems may include: | constant flow variable speed pumps gravity feed hydropneumatic mains pressure system. |
Sustainability principles and concepts: | cover the current and future social, economic and environmental use of resources may include: selecting appropriate material to ensure minimal environmental impact efficient use of material efficient energy usage/capital outlay comparison effect on the environment due to overflow or leakage water efficiency consideration of the Green Building Council of Australia rating scheme. |
Plans: | may include: axonometrics cross-sections details elevations isometrics schematics sections may be produced using: computer generation drawing equipment. |
Specification may include: | bedding flow requirements jointing manufacturer requirements materials residual pressures safety (WHS) specialised components support testing valve selection water treatment workmanship. |
Testing may include: | air pressure defect inspection hydrostatic mains pressure performance quality assurance (QA) audit. |
Commissioning schedule may include: | disinfection flow test leak check pressure test system certification system defects system functions as per design system purge valve operation. |
Operation and maintenance manual may include: | as installed drawings certification documentation maintenance schedules manufacturer brochures and technical information results of commissioning test valve function. |