Unit of competency Outline

Date retreived
23/07/2026 8:26 AM AWST

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Design complex stormwater and roof drainage systems

Design complex stormwater and roof drainage systems

Unit of competency
National Code
CPCPCM5012
State Code
OCO58
TGA Status
Current
DTWD Status
Approved
Current Release Number
2.00
Current Release Date
23/12/2020
View on TGA
State Implementation and Classification
Approved Date
01/06/2021
Field of Education
040327 - Plumbing
Original Release Date
01/06/2021
Nominal Hours
40
Description
This unit specifies the skills and knowledge required to design complex stormwater and roof drainage systems for commercial, industrial and residential properties.The role may involve interaction with architects, builders, suppliers, clients and relevant planning authorities and requires a sound understanding of applicable legislation, standards and codes.This unit requirements are typically carried out by experienced people such as hydraulic design consultants or persons in a supervisory capacity in relation to plumbing services.In some jurisdictions, this unit of competency may form part of accreditation, licensing, legislative, regulatory or certification requirements.
Notes
Elements and Performance Criteria
1 Identify design parameters.
  • 1.1 Determine design scope from plans, specifications and client brief.
  • 1.2 Identify applicable regulatory and legislative requirements for the design of complex stormwater and roof drainage systems.
  • 1.3 Apply sustainability principles and concepts as part of the design process.
  • 1.4 Account for the safety of system users or building occupants.
  • 1.5 Determine and estimate rainfall intensity and volume using measurements of different catchment areas.
  • 1.6 Analyse overland flood path affecting the property and buildings.
  • 1.7 Research and evaluate other information likely to impact the stormwater and roof drainage system design.
2 Plan system components.
  • 2.1 Plan and evaluate strategies for harvesting and re-using rainwater.
  • 2.2 Plan and evaluate methods of collection and disposal of roof surface run-off water.
  • 2.3 Plan and evaluate stormwater detention and retention systems and first-flush stormwater systems.
  • 2.4 Determine and specify the most suitable methods of preventing backflow of sub-soil and stormwater into buildings.
  • 2.5 Plan and evaluate treatment and disposal options for stormwater discharge.
  • 2.6 Plan layout of system components according to design parameters and site limitations and coordinate with other services.
3 Design and size systems.
  • 3.1 Apply regulatory requirements, Australian Standards and codes to all aspects of the stormwater and roof drainage system design.
  • 3.2 Calculate and specify storage volume, pump capacity and discharge pipe size required for stormwater pumping systems as necessary.
  • 3.3 Design stormwater systems requiring pumping.
  • 3.4 Design, select, size and detail system components using appropriate calculations, software applications and approved materials.
  • 3.5 Specify correct installation, laying and jointing procedures for approved materials and components.
4 Prepare documentation.
  • 4.1 Prepare client brief of the preferred design.
  • 4.2 Prepare plans and specifications.
  • 4.3 Prepare testing and commissioning schedule.
  • 4.4 Produce operation and maintenance manual, including information on how to properly and safely maintain the system.
No information
No information
Replaces
State Code National Code Title Type
WF853 CPCPCM5012A Design complex stormwater and roof drainage systems Unit of competency
State Code National Code Title Type
BGB3 CPC50620 Diploma of Hydraulic Services Design Qualification