G12-water-supplies-2

Provisions

Objective

G12.1 The objective of this provision is to–

(a) safeguard people from illness caused by contaminated water;

(b) safeguard people from injury caused by hot water system explosion, or from contact with excessively hot water;

(c) safeguard people from loss of amenity arising from–

(i) a lack of hot water for personal hygiene; or

(ii) water for human consumption, which is offensive in appearance, odour or taste;

(d) ensure that people with disabilities are able to carry out normal activities and functions within buildings.

Objective G12.1(d) shall apply only to those buildings to which section 47A of the Act applies.

Functional requirement

G12.2 Buildings provided with water outlets, sanitary fixtures or sanitary appliances must have safe and adequate water supplies.

Performance

G12.3.1 Water intended for human consumption, food preparation, utensil washing or oral hygiene must be potable

G12.3.2 A potable water supply system shall be–

(a) protected from contamination; and

(b) installed in a manner which avoids the likelihood of contamination within the system and the water main; and

(c) installed using components that will not contaminate the water.

G12.3.3 A non-potable water supply system used for personal hygiene shall be installed in a manner that avoids the likelihood of illness or injury being caused by the system.

Performance–continued

G12.3.5 Sanitary fixtures and sanitary appliances must be provided with hot water when intended to be used for–

(a) utensil washing; and

(b) personal washing, showering or bathing.

G12.3.6 Where hot water is provided to sanitary fixtures and sanitary appliances, used for personal hygiene, it must be delivered at a temperature that avoids the likelihood of scalding.

G12.3.7 Water supply systems must be installed in a manner that–

(a) pipes water to sanitary fixtures and sanitary appliances flow rates that are adequate for the correct functioning of those fixtures and appliances under normal conditions; and

(b) avoids the likelihood of leakage; and

(c) allows reasonable access to components likely to need maintenance; and

(d) allows the system and any backflow prevention devices to be isolated for testing and maintenance.

G12.3.8 Vessels used for producing or storing hot water must be provided with safety devices that–

(a) relieve excessive pressure during both normal and abnormal conditions; and

(b) limit temperatures to avoid the likelihood of flash steam production in the event of rupture.

G12.3.9 A hot water system must be capable of being controlled to prevent the growth of legionella bacteria.

G12.3.10 Water supply taps must be accessible and usable for people with disabilities.

Performance G12.3.5(b) shall apply only to housing, retirement homes and early childhood centres.

Performance G12.3.10 applies only to those buildings to which section 47A of the Act applies.