NCC 2019 Volume Two
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Classification
Building class 1a Building class 1b Building class 2 Building class 3 Building class 4 Building class 5 Building class 6 Building class 7a Building class 7b Building class 8 Building class 9a Building class 9b Building class 9c Building class 10a Building class 10b Building class 10c

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Classification
Building class 1a Building class 1b Building class 2 Building class 3 Building class 4 Building class 5 Building class 6 Building class 7a Building class 7b Building class 8 Building class 9a Building class 9b Building class 9c Building class 10a Building class 10b Building class 10c
Western Australia additions

Western Australia additions

Application of Western Australia additions

This appendix contains additional provisions for application in Western Australia as follows:

Heated water systems

WA 1.1 * * * * *

This clause has been deliberately left blank.

Note

WA 1.2 * * * * *

This clause has been deliberately left blank.

Note

Water use

WA 2.2 Performance provisions

Objective

The Objective is to reduce water demand by using water efficiently and minimising water wastage.

Functional Statements

To reduce potable water demand, a building is to be capable of using potable water efficiently and preventing excessive loss of potable water.

Performance Requirements

  1. Water use efficiency

A building must have features that, to the degree necessary, facilitate the efficient use of potable water appropriate to—

  1. the geographic location of the building; and
  2. the available potable water supply for the building; and
  3. the function and use of the building.
Water loss prevention

A building, including any water holding structure, must have features that, to the degree necessary, prevent the excessive loss of potable water appropriate to—

  1. the geographic location of the building; and
  2. the available potable water supply for the building; and
  3. the function and use of the building; and
  4. the effects of permanent features such as topography, structures and buildings.
Heated water use efficiency

A building must have features that, to the degree necessary, facilitate the efficient use of heated water appropriate to—

  1. the geographic location of the building; and
  2. the available heated water supply for the building; and
  3. the function and use of the building.

Application

Application

The performance provisions of WA 2.2 apply to Class 1 buildings, associated Class 10a buildings and swimming pools associated with a Class 1 building.

A building’s water use efficiency is satisfied by complying with WA 2.3.1.

A building’s water loss prevention is satisfied by complying with WA 2.3.2.

A building’s heated water use efficiency is satisfied by complying with WA 2.3.3.

WA 2.3 Acceptable construction practice

WA 2.3.1 Water use efficiency
  1. All tap fittings other than bath outlets and garden taps must be a minimum of 4 stars WELS rated.
  2. All showerheads must be a minimum of 3 stars WELS rated.
  3. All sanitary flushing systems must be a minimum of 4 stars WELS rated dual flush.
WA 2.3.2 Swimming pool covers and blankets

An outdoor private swimming pool or spa associated with a Class 1 building must be supplied with a cover, blanket or the like that—

  1. is designed to reduce water evaporation; and
  2. is accredited under the Smart Approved Watermark Scheme governed by the Australian Water Association, the Irrigation Association of Australia, the Nursery and Garden Industry Australia and the Water Services Association of Australia.
WA 2.3.3 Heated water use efficiency

All internal heated water outlets (such as taps, showers and washing machine water supply fittings) must be connected to a heated water system or a re-circulating heated water system with pipes installed and insulated in accordance with AS/NZS 3500: Plumbing and Drainage, Part 4 Heated Water Services. The pipe from the heated water system or re-circulating heated water system to the furthest heated water outlet must not be more than 20 m in length or 2 litres of internal volume.