Backflow prevention devices stop water flowing the wrong way. They're used to protect the public drinking-water supply and to protect people living or working inside buildings and properties.
Let us know about a device
If you recently received a letter from us asking for information about any backflow prevention devices you may have installed, please let us know about it.
Installing a backflow prevention device
You need a building consent from us before you can install a backflow prevention device. But if you've already applied for a building consent for other work, you can include your device in the same application.
To apply for a building consent for a backflow prevention device, please complete and submit the following two forms:
- Application for a building consent (Form B-002), available either as:
- Backflow prevention device check sheet [PDF, 96 KB] (Form B-052)
About backflow prevention devices
More information about backflow and backflow prevention.
Q&As about backflow prevention
03 941 8999 or firstname.lastname@example.org