Part 5 – Wastewater Drainage
5.4 Location of Pipelines
- Wastewater pipelines within the Residential Zone shall normally be within the road reserve except where the properties served are below road level.
- Wastewater pipelines in the Industrial Zone shall either be in the road reserve or in the front yard area.
- Wastewater networks (and connections) in the Business Zone shall be either in the rear service lane or at the rear of properties to be served where no service lane exists. The major reticulation and trunk lines, however, shall be in the road reserve (as for Residential Zones).
Where the pipelines are in the road reserve they shall conform to the standard location of underground services and shall be sited within the carriageway, normally 1.5 m from the kerb. Where the offset from the kerb varies due to curves in the street, the manholes shall be located 1.5 m out from the kerb.
Where a wastewater pipeline changes location within a street, it shall do so at an angle of 45 degrees or greater. Where a wastewater pipeline crosses other utility services, it shall do so at an angle of 45 degrees or greater.
On the limited occasions where a wastewater pipeline is within a property, it is required to be parallel to and within 0.5–1.0 m (preferably 0.75 m) from a boundary so as not to reduce the building area available. On sloping ground, the wastewater pipeline should be within the property on the higher land (to avoid conflict with excavation levelling of the lower property).
Where Section 221 of the Resource Management Act 1991 applies a consent notice shall be registered on the Certificate of Title of any allotment having a Council owned pipeline crossing the property. The consent notice shall advise that a public stormwater or wastewater (as appropriate) pipeline crosses under the property and conditions will be placed on any building consent for a structure over the pipeline.
Manhole structures shall be clear of all boundary lines by at least 1.5 m to the centre.
Where the pipeline gradients are greater than 1 in 5, it is expected that anchor and/or anti-scour blocks shall be constructed.
No new private drains shall pass between one lot and another. If crossing of private property is unavoidable, those parts of the pipeline serving more than one lot shall be Council mains with service connections to the property boundaries.
Where Council pipes pass through private property, refer to Section 5.10.2.
Pipe location for works under all consents should facilitate future fee-simple subdivision.
Note: A useful guide is provided in the MPDC Infrastructure Code of Practice.
