NCC 2022 Volume Two - Building Code of Australia Class 1 and 10 buildings
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H9

SA Part H9 Water efficiency

SA Part H9 Water efficiency

Introduction to this Part

This Part contains additional requirements for water efficiency.

Objectives

NCC Blurbs

The Objective of this Part is to efficiently use all available water supplies.

NCC Title

Objective

NCC State
SA
NCC SPTC Current
Objective

Functional Statements

NCC Blurbs

A building is to be constructed in a way that efficiently uses all available water supplies to reduce the amount required from the mains reticulated water supply.

NCC Title

Water efficiency

NCC State
SA
NCC SPTC Current
Water efficiency

Performance Requirements

NCC Blurbs

A building must provide an additional water supply (other than the mains reticulated water supply) which must be plumbed to at least a water closet or a water heater or all the cold water laundry outlets.

NCC Title

Water efficiency

NCC State
SA
NCC SPTC Current
Water efficiency

Deemed-to-Satisfy Provisions

NCC Blurbs

Compliance with SA H9D2 to SA H9D6 for water efficiency satisfies Performance Requirement SA H9P1.

NCC Title

Deemed-to-Satisfy Provisions

NCC State
SA
NCC SPTC Current
Deemed-to-Satisfy Provisions
NCC Blurbs

(1) SA H9P1 only applies to applications for new Class 1 buildings and extensions to existing Class 1 buildings that are designated under Regulation 3(1) of the Planning, Development and Infrastructure (General) Regulations 2017 as HomeBuilder grant development, and where—

  1. the roof catchment area is 50 m2 or more; and
  2. the building or extension is located in a Council area, excluding the Municipal Council of Roxby Downs and the District Council of Coober Pedy; and
  3. for an extension, where it incorporates a water closet or a water heater or laundry cold water outlet.

(2) For the purposes of this Part, Council means: A Municipal or District Council as constituted under the Local Government Act 1999.

NCC Title

Application of Part

NCC State
SA
NCC SPTC Current
Application of Part
NCC Blurbs

(1) Where the roof catchment area of the building is not less than 50 m2, the building must be designed to ensure that surface water run-off from not less than 50 m2 of the roof catchment area is—

  1. collected by a drainage system complying with H1D7; and
  2. stored in a rainwater tank, the storage capacity of which is not less than 1 kilolitre (1000 litres); and
  3. plumbed to at least a water closet or a water heater or all laundry cold water outlets.

(2) Where the roof catchment area of the building is less than 50 m2, all the surface water run-off from the roof catchment area must be collected, stored and plumbed in accordance with (1)(a), (b) and (c).

Explanatory information

SA H9D3 requires the rainwater tank to be plumbed to a water closet, water heater or all laundry cold water outlets. The Office of the Technical Regulator regulates plumbing work in South Australia under the Water Industry Act 2012, including plumbing the rainwater tank to the water closet, water heater or laundry cold water outlets. Stormwater connections, including from the roof to the rainwater tank, and from rainwater tank overflow, are regulated by the local council or relevant authority under the Planning, Development and Infrastructure Act 2016.

NCC Title

Rainwater tank capacity

NCC State
SA
NCC SPTC Current
Rainwater tank capacity
NCC Blurbs

The rainwater tank must be fitted with an overflow device that disposes of overflow from the rainwater tank in accordance with—

  1. any specific requirements of the relevant authority; and
  2. Part 3.3 of the ABCB Housing Provisions.
NCC Title

Rainwater tank overflow

NCC State
SA
NCC SPTC Current
Rainwater tank overflow
NCC Blurbs

The inlet and overflow of the rainwater tank must be fitted with mosquito proof, non-degradable screens.

Explanatory information

SA H9D5 requires the fitting of mosquito proof, non-degradable screens to the rainwater tank. The quality of the water stored in the rainwater tank should be managed in accordance with the Department of Health publication ‘Guidance on the use of rainwater tanks’.

NCC Title

Rainwater tank water quality

NCC State
SA
NCC SPTC Current
Rainwater tank water quality
NCC Blurbs

Where a rainwater tank is supported on a stand or other structure, the supporting structure must comply with clause 2.2.2 of the ABCB Housing Provisions.

NCC Title

Rainwater tank stands

NCC State
SA
NCC SPTC Current
Rainwater tank stands