Design and size stormwater drainage systems

Unit of competency Outline

Date retreived
22/07/2026 11:29 AM AWST

Whilst all efforts are made to provide accurate and timely information from the relevant source/documentation, please be aware that the information supplied may not be the most current version. The accuracy of the detail has not been confirmed by the Department and therefore should not be relied upon without first confirming the contents.

Unit of competency

National Code
CPCPDR4012A

State Code
D7432

TGA Status
Replaced

DTWD Status
Replaced

Current Release Number
1.00

Current Release Date
19/05/2011

View on TGA

State Implementation and Classification

Approved Date

11/10/2011

Field of Education

040327 - Plumbing

Original Release Date

11/10/2011

Nominal Hours

Description

This unit of competency specifies the outcomes required to design, size and document the layout of surface and sub-soil stormwater drainage systems up to legal points of discharge.It covers the preparation for the planning, identification and confirmation of system specifications and requirements, the planning of the system layout and work finalisation processes, including records and documentation.

Notes

Elements and Performance Criteria

1. Prepare for planning.

1.1. Nature and scope of the planning task are identified and confirmed.1.2. Safety (OHS) requirements associated with installation of stormwater drainage systems and workplace environmental requirements are adhered to throughout the work.1.3. Work is organised and sequenced in conjunction with others involved in or affected by the work.1.4. Tools and equipment required for planning, sizing and documenting the layout of stormwater drainage systems, including personal protective equipment, are selected and checked for serviceability.1.5. Work area in which planning process is to be conducted is prepared.

2. Identify system requirements.

2.1. Information and specifications for required work are obtained and confirmed, if necessary by site inspection.2.2. Regulations and relevant Australian standards relevant to the work are consulted and applied to all aspects of the work.2.3. Design criteria are determined from relevant Australian standards and proposed method of installation.2.4. Stormwater catchment and flow requirements are identified.2.5. Stormwater pipe size is determined to conform to regulatory authorities' main or street kerb and relevant Australian standards.2.6. Stormwater retention pit size, silt and flotation arrestor pit size, rainwater tank size and stormwater overflow discharge locations are determined to suit job requirements.2.7. System type is selected to suit collection and disposal requirements.2.8. Sustainability principles and concepts are applied to work preparation and application.

3. Design system layout.

3.1. Layout of stormwater drainage system is planned in accordance with plans, specifications, relevant Australian standards, and workplace procedures.3.2. Stormwater disposal system is specified in accordance with job requirements.3.3. Materials required are specified and optimised from proposed design according to relevant Australian standards.3.4. Plans are recorded in accordance with statutory and regulatory authorities' and workplace requirements.

4. Restore work area.

4.1. Work area is restored in accordance with workplace procedures.4.2. Tools and equipment used in the process are refurbished and left in accordance with workplace procedures.4.3. Information is accessed and documentation, including work backup, is completed in accordance with workplace requirements.

No information

Replaces

State Code	National Code	Title	Type
W9663	CPCPDR4002A	Plan, size and lay out stormwater drainage systems	Unit of competency

Replaced By

State Code	National Code	Title	Type
WF866	CPCPDR4012B	Design and size stormwater drainage systems	Unit of competency

State Code	National Code	Title	Type
D417	CPC40911	Certificate IV in Plumbing and Services	Qualification