NCC 2022 Volume Three - Plumbing Code of Australia
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B6
Part B6 Rainwater servicesPart B6 Rainwater services
A rainwater service must—
A rainwater service must comply with Section 15 of AS/NZS 3500.1.
The Victorian NCC 2019 rainwater tank variation (VIC V2.6.1 and V3.12.0 respectively) remains in effect until 30 September 2023 after which the following takes effect:
A rainwater tank must be installed in a Class 1 building in accordance with the regulations made under the Building Act 1993 (Victoria).
See Part B7 clause B7D4.