Unit of competency Outline

Date retreived
22/07/2026 3:39 PM AWST

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Design and size stormwater drainage systems

Design and size stormwater drainage systems

Unit of competency
National Code
CPCPDR4012
State Code
OCN04
TGA Status
Current
DTWD Status
Approved
Current Release Number
3.00
Current Release Date
09/12/2021
View on TGA
State Implementation and Classification
Approved Date
01/06/2021
Field of Education
030907 - Water And Sanitary Engineering
Original Release Date
01/06/2021
Nominal Hours
32
Description
This unit specifies the skills and knowledge required to design, size and document the layout of surface and sub-soil stormwater drainage systems up to legal points of discharge to a residential dwelling (Class 1a), a commercial Class 6 building, and a unit complex comprising at least eight (Class 1a) dwellings.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 system requirements.
  • 1.1 Access, read and determine design requirements from plans, specifications, relevant manufacturers requirements, Australian Standards and jurisdictional requirements.
  • 1.2 Identify and apply workplace policies and procedures, work health and safety (WHS) and environmental requirements.
  • 1.3 Identify stormwater catchment and flow requirements.
  • 1.4 Select stormwater pipe size to conform to regulatory authorities and main or street kerb, including discharge flow and levels to verify grades and cover.
  • 1.5 Determine stormwater requirements for retention pit, silt and flotation arrestor pit, rainwater tank and stormwater overflow discharge locations to suit job requirements.
2 Design system layout.
  • 2.1 Develop and size system layout in accordance with manufacturer’s requirements, Australian standards and jurisdictional requirements.
  • 2.2 Use the proposed design to identify and specify optimal materials required.
  • 2.3 Produce final system layout plans to relevant drawing design standards.
No information
No information
Replaces
State Code National Code Title Type
WF866 CPCPDR4012B Design and size stormwater drainage systems Unit of competency
State Code National Code Title Type
BGC7 CPC40920 Certificate IV in Plumbing and Services Qualification