Part 5 – Wastewater Drainage

5.12    Connections

5.12.1     General

A single connection provided at the boundary of each lot shall be of a type capable of taking an approved pipe of 100 mm nominal diameter, unless a larger size is required by design.  Council does not permit lots to be served by multiple connections.

Each connection shall be capable of serving the whole of the lot by gravity.  This requirement shall allow adequately graded drains within the lot, together with the depth required for gully traps.  The standard depth of a new connection at the boundary is 1.2 m (range 0.9–1.5 m).  Note: Private wastewater pumps will not be approved where gravity discharge is feasible.

In laying “greenfield” service connections which are capped pending connection of house drainage the maximum depth at the end of the service connection pipe shall be 1.5 m.  Sections which slope away from the drainage direction may require a service connection which is deeper than 1.5 m at the boundary in order to comply with the requirement to drain the whole of the lot.  In such cases the service pipe shall be extended into the property on grade and to the extent that its end cap is no deeper than 1.5 m.  Note the service pipe needs to be located near the boundary or within a right of way in order to avoid conflict with possible building locations.  This detail shall be shown on construction plans.

Where the wastewater pipe is outside the lot to be served by it, the connection shall be extended to the boundary of the lot.

If the above conditions cannot be met, then contact Council for further advice.

All connections, which are to be made directly to the line, shall be designed using a factory manufactured “wye” or “London Junction” and shall be watertight.

Service connections shall generally enter each lot from the road frontage.  Where a property has no road frontage, pipes are located within that property’s legal access (right of way).

Where feasible:

• Private pipes shall not cross property boundaries;
• Existing private connections crossing boundaries shall be replaced by a public connection; and
• Existing private pipe work will not usually be acceptable for vesting to Council.

All connections, which are to be made directly to the line up to 150 mm diameter, shall be cut into the main line using a PVC “wye” and approved rubber adapters. Larger diameter connections shall be designed using a factory manufactured “wye” or “London Junction”.  All connections shall be watertight.

5.12.2    Infill Developments

Connection proposals for infill developments shall be fully documented with regard to depth to invert, pipe size and distances to boundaries.  (Where Council records are not available, applicants must determine the details of existing connections.)

Any private pipe work needs a Drainage Consent.  

Note: All connections and disconnections of Council services to the property boundary are undertaken by Kaimai Valley Services.