NCC 2022 Volume Three - Plumbing Code of Australia
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D1
Part D1 Excessive noisePart D1 Excessive noise
A plumbing and drainage system must be designed and installed so as to operate in a way that avoids the likelihood of excessive noise of any part of the plumbing and drainage system, and minimises any adverse impact on building occupants.
To prevent undue noise, plumbing and drainage systems must comply with—