NCC 2016 Volume Two
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Classification
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Classification
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WA 2

WA 2

WATER USE

WA 2.1 Definitions

The following definitions are used in this Part—

Potable water means water intended for human consumption supplied by a water services provider.
WELS has the meaning given in the Water Efficiency Labelling and Standards Act 2005 of the Commonwealth section 7.

WA 2.2 Performance Provisions

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

Performance Requirements

(a)
Water use efficiency

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

(i)

the geographic location of the building; and

(ii)

the available supply for the building; and

(iii)

the function and use of the building.

(b)
Water loss prevention

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

(i)

the geographic location of the building; and

(ii)

the available supply for the building; and

(iii)

the function and use of the building; and

(iv)

the effects of permanent features such as topography, structures and buildings.

(c)
Heated water use efficiency

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

(i)

the geographic location of the building; and

(ii)

the available heated water supply for the building; and

(iii)

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

ACCEPTABLE CONSTRUCTION PRACTICE
WA 2.3.1

Water use efficiency

(a)

All tap fittings other than bath outlets and garden taps must be a minimum of 4 stars WELS rated.

(b)

All showerheads must be a minimum of 3 stars rated.

(c)

All sanitary flushing systems must be a minimum of 4 stars 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—

(a)

is designed to reduce water evaporation; and

(b)

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.