NCC 2022 Volume Three - Plumbing Code of Australia
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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

B5

Part B5 Cross-connection control

Part B5 Cross-connection control

NSW B5D6 RainwaterNew for 2022

Delete clause B5D6 and insert NSW B5D6 as follows:

Drinking water and non-drinking water must:

  1. be zone protected from above ground, buried or partially buried rainwater tank in Class 1 buildings, utilising a non-testable device; or
  2. comply with AS/NZS 3500.1 (2018) Clause 16.4 and Table 16.4 for all other building classes.

Applications

B5D6 applies to scenarios not covered by S41C6(1)(b).

NSW B5D7 Cooling tower water service2019: NSW B5.501

Insert NSW clause B5D7 in clause B5D7 as follows:

Water systems permanently attached to cooling towers backflow prevention shall be positioned so that—

  1. cooling tower air gap must be measured from the rim of the cooling tower basin; and
  2. if a drinking water service to the cooling tower passes through the basin, the service pipe must be provided with a double wall protection; and
  3. if a fast fill connection is required, the fast fill line shall terminate externally to the unit, with an air gap over either the basin or a tundish.

Notes

See NSW Figure B5D7 for typical cooling tower connections.

Insert NSW figure (B5D7) B5D7 as follows:
NSW Figure B5D7: Typical cooling tower service
image-B5D7-typical-cooling-tower-service-NSW.svg
Figure Notes

Note 1.

Refer to AS/NZS 3500.1 Part 1 Table 4.6.3.2