NCC 2016 Volume Three
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Part B1 Cold Water Services (Deemed-to-Satisfy)

Part B1 Cold Water Services (Deemed-to-Satisfy)

B1.1 Deemed-to-Satisfy Provisions

Performance RequirementsBP1.1 to BP1.3 are satisfied by complying with B1.2 to B1.6.

B1.2 General requirements

NSW B1.2(a)

Qld B1.2(a)

SA B1.2(a)

(a)

The design, construction, installation, replacement, repair, alteration and maintenance of cold water services must be in accordance with—

(i)
(ii)

for a Class 1a or Class 10 building only, Section 2 of AS/NZS 3500.5;

and the requirements of this Part.

(b)

* * * * *

Qld B1.2(c)

(c)

The requirements of (a)(ii) do not apply to the main lines of a water service serving 20 or more Class 1a buildings on the same allotment.

SA B1.2(d)

Tas B1.2(d), (e)

Vic B1.2(d), (e)

B1.3 Accessible fixtures and fittings

Cold water supply taps or other operational controls provided for people with a disability in sanitary facilities must be in accordance with—

(a)

AS 1428.1 (2001) and AS 1428.2 for all Class 9b and Class 10 public transport buildings; and

(b)

AS 1428.1 (2009) for all other buildings.

Explanatory information: Cross-volume considerations

Explanatory information: Cross-volume considerations

Part F2 of NCC Volume One sets out the requirements for the design and construction of accessible sanitary facilities in Class 1b, 2 to 9, and 10a buildings.

B1.4 Cross-connection control

Where a property is served by a non-drinking water supply—

(a)

a backflow prevention device suitable for the degree of hazard and sized to suit the capacity of the drinking water service must be fitted to the drinking water service at—

(i)

the meter; or

(ii)

the point of connection, where a meter is not installed; and

(b)

a low hazard backflow prevention device must be fitted to each external drinking water hose tap outlet.

B1.5 Sanitary flushing

Qld B1.5(a)

(a)

A cistern or flushing valve used for the purpose of flushing a water closet pan must have a dual flushing mechanism that, when operated, discharges—

(i)

for a 6/3 litre cistern—

(A)

not less than 5.5 litres and not more than 6.5 litres for a full flush; and

(B)

not less than 3.0 litres and not more than 3.5 litres for a reduced flush; and

(ii)

for a 4.5/3 litre cistern—

(A)

not less than 4.3 litres and not more than 4.7 litres for a full flush; and

(B)

not less than 2.8 litres and not more than 3.2 litres for a reduced flush.

(b)

The volume of water discharged to flush a urinal must not exceed 2.5 litres for each—

(i)

single urinal stall; or

(ii)

600 mm length of a continuous urinal wall, or part thereof.

(c)

Automatic or set-cycle cisterns must not be installed.

Explanatory information

Explanatory information:

A programmed solenoid operated flushing system may be used if programmed to shut down during extended periods of non-occupancy of a building. Prior to installing this type of system further advice should be sought from the authority having jurisdiction. Where sensor control is used for urinal flushing, sensors should be located to avoid unnecessary 'nuisance' flushing triggered by pedestrian traffic.

B1.6 Maximum flow rate for cold water outlets

(a)

A cold water outlet of a shower, basin, kitchen sink or laundry trough must have a maximum flow rate of not more than 9 litres per minute.

(b)

The requirements of (a) do not apply to a shower intended to provide rapid drenching of a person for emergency purposes, such as chemical removal.

Explanatory information

Explanatory information:

B1.6 applies to outlets which provide cold water only. The Deemed-to-Satisfy Provisions for outlets which deliver a combination of cold water and heated water are in B2.6.

Explanatory information: Cross-volume considerations

Explanatory information: Cross-volume considerations

NCC Volumes One and Two deal with a number of areas of on-site construction which are relevant to cold water services. These include, but may not be limited to, the following:

NCC Volume One Class 2 to 9 buildings

NCC Volume Two Class 1 and 10 buildings

Excavations for pipework adjacent to a building and footings

B1 Structural Provisions

3.1.1 Earthworks

Termite management for attachments to buildings and penetrations through a slab

B1 Structural Provisions

3.1.3 Termite Risk Management

Penetrations for pipework through a vapour barrier

B1 Structural Provisions

3.2.2 Preparation

Pipework in timber bearers and joists of solid timber or engineered wood products

B1 Structural Provisions

3.4.0 Framing

Fittings, fixtures and pipework installations in steel framed construction

B1 Structural Provisions

3.4.2 Steel Framing

Penetrations through a fire-resisting wall or floor

C3 Protection of Openings

3.7.1 Fire Separation

Fixtures or fittings in a wet area

F1 Damp and Weatherproofing

3.8.1 Wet Areas and External Weatherproofing

Service pipework external to the building and penetrations through roof cladding in a bushfire prone area

G5 Construction in Bushfire Prone Areas

3.7.4 Bushfire Areas

Pipework sound insulation

F5 Sound Transmission and Insulation

3.8.6 Sound Insulation

Power supply to boiling and/or chilled water storage units

J6 Artificial Lighting and Power

Not applicable