Part D1 Excessive noise
Introduction to this Part
The Objective of this Part is to—
- safeguard people from illness, injury or loss (including loss of amenity) due to excessive noise of a plumbing and drainage system; and
- ensure that a plumbing and drainage system installation throughout its serviceable life will continue to satisfy the requirements of Objective (a).
Plumbing and drainage systems 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.
DP1.1 Undue noise
DP1.2 Excessive noise
There are no Verification Methods in this Part.
D1.2 Undue noise
B1.4 for cold water services; or
B2.9 for heated water services; or
B4.2 for fire-fighting water services; or
D1.3 Sound insulation
If a plumbing or drainage system serves or passes through more than one sole-occupancy unit in a Class 2, 3 or 9c building, it must be separated from the rooms of any other Sole-occupancy unit by construction with an Rw + Ctr (airborne) not less than—
40 if the adjacent room is a habitable room (other than a kitchen); or
25 if the adjacent room is a kitchen or a non-habitable room.
only be installed in discontinuous construction; and
not be fixed to the wall of a dwelling that it does not serve; and
have a gap not less than 10 mm between the pipe and a wall of a dwelling that it does not serve; and
not be chased in if the separating wall is made of concrete or masonry.