Water and Sewerage Regulation 2001

This section applies if—

the drainage system of a dwelling or building (the first dwelling or building) is combined with the drainage system of a dwelling or building on another parcel of land; and

the combined drainage system is in the other parcel of land; and

the combined drainage system was installed before 1 March 1999; and

significant work has to be done on the drainage system of the first dwelling or building.

A person doing significant work must—

disconnect the existing drainage pipes from the combined drainage system; and

if no separate drainage system is in place for the dwelling or building—install a separate system; and

connect the first dwelling or building to that drainage system.

In this section:

significant work means work where—

drains to more than 1/2 the fixtures are altered; or

the number of fixtures is increased by more than 1/2.