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Infrastructure Development Code

DS-7.8 Point of Supply

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The following shall apply:

  1. The point of supply is the connection between a property’s private pipework and the public water supply network.
  2. The reticulation shall provide a point of supply no further than 300mm from any property or lot boundary. 
  3. For multi units or unit title type developments the point of supply shall be at the road frontage, internal connections and reticulation shall be designed to meet the same standard as if the assets were to be vested in Council, albeit they shall be held in ownership and or management of a body corporate or similar management structure.

DS-7.8.1   Minimum Requirements

The following shall apply:

  1. Property service connections shall be designed to the following minimum requirements:
    1. All lots shall be served by one service connection to a rider or principal main. Such connection shall be a minimum internal diameter of a 20mm. For commercial and industrial lots or land uses the size of connection shall be determined once the water usage required for the lot is established.
    2. Any connections to the existing Council reticulation system shall only be undertaken by a Council Licensed Contractor.
    3. At the point of supply the connection shall include metering, toby box and back flow prevention the type of backflow prevention to be determined by the activities on site.
    4. Any individual lot connection shall be designed and located to suit the existing and future development scenarios and where possible sized, located and designed to meet the service of the whole lot.
  2. The design shall satisfy the requirements of the Council policy on metering of supply which is contained in the current Water Supply System Bylaw and related regulations. Property service connections to existing water reticulation mains shall be undertaken in accordance with the Water Supply System Bylaw.

DS-7.8.2   Private Supply Pipes

Drawing Ref: T700

Generally all water supply pipes installed between a building and the point of supply are private assets. The Building Act requires that a building consent shall be obtained for their installation or alteration and that this work shall only be carried out by a suitably qualified craftsman plumber.

DS-7.8.3   Connection Locations

Drawing Ref: T727, T728, T729

The following shall apply:

  1. Front lots (or dwelling units with individual street frontage): The service connection shall be at the street boundary. The service pipe shall be terminated 300mm on the street side of the front boundary and next to the electricity and telecommunications connections with a manifold incorporating a toby valve, a dual check valve (backflow preventer), an approved meter and a toby box.
  2. Back lots (or dwelling units without individual street frontage) of up to two dwelling units shall have separate service connections at the street frontage, as in (a) above. The terminal ends shall be clearly pegged.
  3. In privateways serving more than 3 rural residential lots or more than 6 residential lots/units:
    1. A 50mm internal diameter service main shall be laid in the privateway with separate service connections off that service line for each lot or dwelling.
    2. A 25mm scour valve and backflow prevention shall be installed at the end of the main.
    3. Special circumstances may apply for privateways and may be discussed at the pre-approval meeting.
    4. The connection toby shall be within the privateway adjacent to the lot served. The service line (up to the point of supply) shall have easements in favour of Council over them.
  4. Body corporate and multi unit developments shall either:
    1. Construct internal water mains and individual connections to the standards required within the IDC and vest these with easements in Council.
    2. Install a bulk supply meter and backflow at the road frontage plus individual meters on the internal connections and retain supply in Body Corporate ownership. Refer to Council's Water Supply Bylaw for further details.
  5. Commercial/industrial lots shall have the point of metered supply service connection located as per (a) and (b) above except that for connections larger than 20mm diameter the backflow prevention system shall be located as near as practical to the property side of the boundary / R.O.W. (as applicable) and as close as practicable to the metered supply.

DS-7.8.4   Connection Depth

The service connection shall have 500mm cover (± 50mm) from the main to within 500mm of the edge of the meter box and rise to 350mm cover through the meter box. Connection depth shall be noted on the detailed design drawings.

DS-7.8.5   Connection Pipes

The following shall apply:

  1. Every separable dwelling or tenancy shall have its own manifold incorporating an isolating valve (toby) at the point of supply. 
  2. All lots shall be provided with a water supply connection that is appropriately sized for the intended land use.
  3. Refer to AM-7 Water Supply for approved products and materials.
  4. The Designer shall take into account head losses for service connections in serving building sites over long distances especially in rural or rural residential areas.
  5. Service pipes located in private easements are not permitted.


DS-7.8.6   Connection Fittings

Drawing Ref: T730, T731, T732, T733, T734, T735, T736, T738, T739, T740

The following shall apply:

  1. Water Meters 
    1. Meter type and specifications shall be in accordance with AM-7 Water Supply
    2. For meters 50mm Nominal Diameter or larger, design information shall be provided via a Water Supply / Drainage / Vehicle Crossing Connection Application Form for approval and shall include the design flow rates (minimum, average, maximum), proposed meter make/model and manufacturers specification. 
    3. Where automated meter reading is to be used, please refer to Council's Smart Metering Guide for Developers (available on request from Council).
    4. Meters within gated communities will be subject to a separate service level agreement. Council may vest ownership of the meters beyond the point of supply and agree to read these meters on behalf of the body corporate.
    5. Meter manifolds shall be located where customers can easily locate the property isolating valve in the meter box in case of emergency.
  2. Backflow Protection 
    1. Backflow protection is required at the Point of Supply and as near as practical to the boundary. Any above ground device (Reduced Pressure Zone) is to be installed parallel to the front boundary. 
    2. The level of protection is determined after surveying the occupancy of the property and referring to clause 3.3 Cross Connection Hazards in The Approved Document for New Zealand Building Code clause G12, Water Supply, Second Edition.
  3. Tapping Bands 
    1. Each service connection to a principal main or rider main shall be by means of a tapping band. 
    2. The tapping band for each service connection shall be sited adjacent to the electricity and telecommunications connections, close to a side boundary, but not perpendicular to the toby. It shall be located within the boundary alignment.

DS-7.8.7   Connection to Existing Council Reticulation

Approval shall be obtained from Council before connection can be made to the water supply network. Application for this shall be on Council's Water Supply / Drainage / Vehicle Crossing Connection Application Form.

All connections to Council infrastructure shall be carried out only by a Council Licensed Contractor.


Definitions in this section

Asset

Building act

Council

Design

Designer

Ground

Licensed contractor

Lot

Principal

Privateway

Road

Street

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