New Homes or additions made to existing dwellings are generally required to install a modern three stage aerobically based Wastewater Treatment Plant.
In some cases it is possible to demonstrate that the existing septic tank will adequately cater for the new dwelling, and this requires an expert opinion.
Click on the link below for Local drainlayers contact details:
The link below contains a list of Water NZ members who provide new systems.
The firms with significant representation on the island are Aqua Nova, Jet Waste and Water, Hynds, Innoflow, Oasis Clearwater and Reflections.