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  2. General
  3. Infrastructure Development Processes
  4. Quality Assurance Information Requirements
    1. QA-1 Resource Consent Application Requirements
    2. QA-2 Works Undertaken By or For a Council
    3. QA-3 Development Works Approval
    4. QA-4 Survey Plan (s223) Approval
    5. QA-5 Final Sign Off (s224c) Application Requirements
    6. QA-6 As-Built Information
    7. QA-7 Bonds and Maintenance Fee
    8. QA-8 Building Consent Considerations
  5. Design Standards
    1. DS-1 General Provisions
    2. DS-2 Streetscape
    3. DS-3 Reserves
    4. DS-4 Transportation Network
    5. DS-5 Stormwater
    6. DS-6 Wastewater
    7. DS-7 Water Supply
    8. DS-8 Public Lighting
    9. DS-9 Network Utilities
    10. DS-10 Natural Hazards & Earthworks
    11. DS-11 Road Zone/Road Reserve Occupancy
    12. DS-12 Building Consent Considerations
  6. Standard Drawings
    1. SD-1 General Provisions
    2. Street design diagrams
    3. T100 Perspective Drawings
    4. T200 Streetscape
    5. T300 Reserves
    6. T400 Transport Network
    7. T500 Stormwater
    8. T600 Wastewater
      1. T601-Manhole - Standard
      2. T602-Manhole - Shallow
      3. T603-Manhole - Ladder and Steps
      4. T604-Manhole - Precast 1050mmØ Lid
      5. T605-Manhole - Entry Fixing
      6. T606-Manhole - Standard and Raised Access Detail
      7. T607-Manhole - Inclined Access Detail
      8. T608-Manhole - Internal Drop
      9. T609-Manhole - External Drop
      10. TT610-Manhole - PE Pipe Connections - Wall Adapter and Pre-Cast Manhole
      11. T611-Manhole - PE Pipe Connections - Stub Flange and In-Situ Base
      12. T612-Manhole - PE Pipe Connections - Electrofusion Coupler and In-Situ Base
      13. T613 Manhole - PE Pipe Connections - Puddle Flange and Pre-Cast Manhole
      14. T614-Manhole - Access Detail in Carriageway
      15. T620-Rodding Eye - Shallow < 2.5m
      16. T621-Rodding Eye - Deep > 2.5m
      17. T630-Property Connection - Standard
      18. T631-Property Connection - Depth > 2.5m
      19. T632-Property Connection - Within Property
      20. T633-Property Connection - Outside Property
      21. T634-Property Connection - Entry to Wastewater Main/Manhole
      22. T637-Lateral Connection - Single Connection to Manhole
      23. T638-Lateral Connection - Two or More Connections to Manhole
      24. T639-Lateral Connection - Single Connection to Main
      25. T640-Lateral Connection - Two Connections to Main
      26. T641-Lateral Connection - Two Adjacent Connections to Main
      27. T642-Lateral Connection - Rear Lot Connection
      28. T643-Mains Connection - Saddle Connection
      29. T651-Bedding and Backfill Details
      30. T652-Anti-Scour Block and Trenchstop
      31. T653-Buildings Near Public Mains
      32. T654-Close Proximity - Retaining Wall Restrictions
      33. T660-Pump Station - Typical Site Layout
      34. T661-Pump Station - Elevation Section
      35. T662-Pump Station - Plan Section
      36. T663-Pump Station - Pedestal Base Plate, Pedestal Mounting, Valve Chamber and Riser Connection
      37. T664-Pump Station - Deflector Plate, Ladder and Plinth
      38. T665-Pump Station - Valve Extension Spindle, Spindle Guide and Handwheel
      39. T666-Pump Station - Cover Slab
      40. T667-Pump Station - Frame
      41. T668-Pump Station - Chamber Lid
      42. T669-Pump Station - Chamber Lid Padlock and Handle
      43. T670-Pump Station - Rising Main Entry to Receiving Manhole
      44. T671-Pump Station - 25mm Water Service Connection
      45. T672-Pump Station - Electrical - Standard 2 Pump Stn Without Soft Starters (1 of 2)
      46. T673-Pump Station - Electrical - Standard 2 Pump Stn Without Soft Starters (2 of 2)
      47. T674-Pump Station - Electrical - Standard 2 Pump Stn SMC - 3 Soft Starters (1 of 2)
      48. T675-Pump Station - Electrical - Standard 2 Pump Stn SMC - 3 Soft Starters (2 of 2)
      49. T676-Pump Station - Electrical - Standard 2 Pump Stn IMS2 Soft Starters (1 of 2)
      50. T677-Pump Station - Electrical - Standard 2 Pump Stn IMS2 Soft Starters (2 of 2)
      51. T678-Pump Station - Electrical - Standard 2 Pump Stn ISMC - 3 Soft Starters (1 of 3)
      52. T679 Pump Station - Electrical - Standard 2 Pump Stn ISMC - 3 Soft Starters (2 of 3)
      53. T680-Pump Station - Electrical - Standard 2 Pump Stn ISMC - 3 Soft Starters (3 of 3)
      54. T681-Electrical - 2 Pump Stn Mincas SMC-3 Soft Starters (1 of 2)
      55. T682-Electrical - 2 Pump Stn Mincas SMC-3 Soft Starters (2 of 2)
      56. T683-Pump Station - Electrical Cabinet
    9. T700 Water Supply
      1. T700-Water Supply Pipe Hierarchy
      2. T701-Water Supply - Looped and Linked Principal Mains
      3. T705-Water Main - Location at Intersections
      4. T706-Watermain - Location at Cul de Sac
      5. T707-Water Main - Rider Main to Main Connection
      6. T708-Water Main - Flushing Point
      7. T709-Water Main - Branch Valves and Hydrant Combinations
      8. T710-Water Main - Support for Asbestos Cement Main
      9. T713-Hydrant Surround
      10. T714-Hydrant Box
      11. T715-Hydrant Surround Blocks
      12. T716-Valve Surround
      13. T717-Valve Box
      14. T718-Valve Surround 75mm Concrete
      15. T719-Valve Surround 100mm Concrete
      16. T720 Valve Surround Heavy Duty Concrete
      17. T721-Anchor block for Sluice Valves on Mains
      18. T722-Anchor Block for Flanged Fittings on Mains
      19. T723-Thrust Blocks
      20. T724-Hydrant and Valve Marker Post
      21. T727-Water Meter - Type 1 and 2 Point of Supply Location Installation
      22. T728-Water Meter - Type 3 and 4 Point of Supply Location Installation
      23. T729-Water Meter - Fire System Connection With Potable Supply Installation
      24. T730-Standard 20mm Manifold Connection
      25. T731-Standard 20mm Manifold Connections - Plan View
      26. T732-Multiple 20mm Installations
      27. T733-20mm Connection Requiring Double Check Valve
      28. T734-20mm Connection Requiring RPZ Installation
      29. T735-25mm, 40mm or 50mm Meter Installation With Double Check Valve
      30. T736-<50mm Meter Installation with RPZ
      31. T737-Property Connection - 50mm Combination Meter Installation with Double Check Valve
      32. T738-Combination Meter Installation with RPZ
      33. T739 >50mm Combination Meter Installation with RPZ & Bypass Option
      34. T740-Property Connection - Secure Connection
      35. T741-Manhole - Class A Loading
      36. T742-Chamber - Class A Loading
      37. T743-Manhole - Class B Loading
      38. T744-Chamber - Class B Loading
      39. T751-Bedding and Backfill Details
      40. T753-Buildings Near Public Mains
    10. T800 Public Lighting
    11. AB As-Built Drawings
  7. Approved Materials
  8. Construction Standards
    1. CS-1 General
    2. CS-2 Site Clearance
    3. CS-3 Earthworks
    4. CS-4 Excavation
    5. CS-5 Excavation in Trench
    6. CS-6 Fill
    7. CS-7 Bedding & Backfill
    8. CS-8 Subsoil Drainage for Earthworks & Roads
    9. CS-9 Pipework
    10. CS-10 Pipe Fittings
    11. CS-11 Manholes & Rodding Eyes
    12. CS-12 Sumps
    13. CS-13 Trenchless Technology
    14. CS-14 Road Ripping
    15. CS-15 Road Pavement Layers
    16. CS-16 Kerb & Channel
    17. CS-17 Concrete Work
    18. CS-18 Carriageway Surfacing
    19. CS-19 Roadmarking
    20. CS-20 Berm Features
    21. CS-21 Street Structures
    22. CS-22 Road Maintenance
    23. CS-23 Grassing & Turfing
    24. CS-24 Vegetation Planting & Gardens
    25. CS-25 Reinstatement
  9. Inspection & Testing Requirements
    1. IT-1 General Provision
    2. IT-2 Streetscape
    3. IT-3 Reserves
    4. IT-4 Transportation Network
    5. IT-5 Stormwater
    6. IT-6 Wastewater
    7. IT-7 Water Supply
    8. IT-8 Public Lighting
    9. IT-9 Network Utilities
Infrastructure Development Code

DS-7.7 Key Operational Fittings

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This section describes the requirements for fittings that may be present in conveying a Water Supply reticulated system. These are categorised as:

  1. DS-7.7.1 Fire Hydrants.
  2. DS-7.7.2 Valves.
  3. DS-7.7.3 Anchor and Thrust Blocks.
  4. DS-7.7.4 Other Fittings (as specifically designed).

DS-7.7.1   Fire Hydrants

Drawing Ref: T714, T715, T716a, T716b, T716c, T716d, T724

Unless stated in the IDC, fire hydrants shall comply with SNZ PAS 4509. The following shall apply:

  1. The maximum spacing between hydrants is:
    1. 135m for residential areas.
    2. 90m for commercial and industrial areas.
  2. The maximum distance from a hydrant to the furthest serviceable point for fire fighting i.e. building platform is:
    1. 135m for residential areas.
    2. 90m for commercial and industrial areas. For the purposes of this requirement, a building platform means any part of a front, corner or through site and that part of a rear site which does not include the access strip. This distance shall be measured along the route which a fire hose would normally be laid after construction of the building or structure.
  3. In a cul-de-sac or other terminal streets, the last hydrant shall be at the end of the main at the turning head.
  4. If necessary, a 100mm diameter principal main shall be constructed and a hydrant placed within the privateway to satisfy the above requirements. This main will be accepted as public reticulation by Council and shall be protected by an appropriate easement to allow access for maintenance.
  5. Hydrants shall be readily accessible to fire appliances, generally be positioned near street intersections and not placed within 6m of any building unless authorised by the Chief Fire Officer. Attention shall be given to the location of hydrants at intersections and in cases of dispute the Council will refer the matter to the Chief Fire Officer who shall make the final decision.
  6.  Hydrants shall not be offset into the roadway except in commercial or industrial areas where buildings can be constructed on the boundary and the offset stated in e) above applies.
  7. Hydrants shall be located wherever practicable within the berm but shall not be positioned within driveways or next to above ground infrastructure or trees that restrict access to or use of the hydrant.
  8. Additional to fire fighting requirements, hydrants shall be located:
    1. At high points on reticulation mains to release air during charging, allow air to enter the main when dewatering and facilitate manual release of any build up of air where automatic combination air valves are not installed.
    2. At localised low points on water mains to drain the water main where scour valves are not installed.
    3. Where a scour valve is not provided at the end of any main 100mmØ or greater.
  9. Drainage facilities shall be provided (or already be present) to receive the hydrant flows from dewatering and flushing operations. 
  10. Where approved by Council, hydrants installed on trunk mains will be fitted with an isolating valve. The tee will be positioned facing horizontal. 
  11. All fittings shall be flanged and shall be compatible with each other to achieve their intended use. Extra attention shall be given during installation to ensure that the correct tools are used and the correct tightening torque for each fitting (as advised by the manufacturer) is achieved.
  12. Refer to AM-7 Water Supply for approved fire hydrant components.


DS-7.7.2   Valves

Drawing Ref: T717, T718, T719, T720, T721a, T721b, T721c, T721d, T722, T723, T724

The following shall apply:

  1. Air release valves, scour valves, pressure reducing valves and pump out branches require the specific approval of Council and shall be designed and installed in accordance with NZS 4404 Part 6.
  2. The maximum distance between valves on mains is:
    1. 500m on mains with service connections.
    2. 1000m on mains without service connections.
    3. As approved by Council where special circumstances are present.
  3. Wherever practicable valves shall be located in berms. For new water mains, valves shall be located at junctions with existing mains. 
  4. Valves shall be located as close to the principal main as possible.
  5. Rider mains shall have valves at both ends of the rider main immediately adjacent to the principal main. 
  6. Valve layout for intersections shall be as shown on the Standard Drawings.
  7. Valves shall be specifically located to minimise disruption of supply to consumers. A sufficient number of valves shall be provided to satisfy this requirement. No more than 40 independent dwelling units shall be isolated together. Isolating multiple dwelling units beyond this requires specific approval from Council.
  8. Butterfly valves shall not be used within the reticulation network.
Explanatory Note:
These valve types can create internal obstructions that are not compatible with network operations and maintenance. They can be appropriate to achieve the design outcomes for instances such as those required for treatment plants or reservoirs.
  1. Pressure zone dividing valves and hydrants shall be installed as shown on the Standard Drawings. 
  2. Additional valves may be installed to provide a secure service connection to a customer requiring a greater security of supply such as a hospital or large industrial / commercial development. The typical arrangements to facilitate partial isolation of the main while maintaining supply to the customer is shown on the Standard Drawings.
  3. An extension spindle shall be incorporated as necessary to ensure the top of the spindle is between 150mm and 1000mm below the finished surface level.
  4. All fittings shall be flanged, unless an alternative is specifically approved by Council, and shall be compatible with each other to achieve their intended use. Extra attention shall be given during installation to ensure that the correct tools are used and the correct tightening torque for each fitting (as advised by the manufacturer) is achieved.
  5. Refer to AM-7 Water Supply for approved valve components.

DS-7.7.3   Anchor and Thrust Blocks 

Drawing Ref: T721, T722, T723

The following shall apply:

  1. On PVC mains: Anchor or Thrust blocks shall be provided for all bends, tees, pipe reducers, dead (blank) ends and hydrants points where an unbalanced thrust occurs on mains 50mmØ or greater as shown on standard drawing T723.
  2. On PE mains: It shall not be assumed that the requirement for anchor / thrust blocks on PE piped reticulation is the same as that for PVC pipe materials. For typical butt welded or electrofusion joints there is little chance of joint separation so ground support is not generally required. However, it may be necessary to provide pipe support. where:
    1. Change of direction is required.
    2. Ground conditions cannot adequately support the pipe.
    3. Installation is on a steep gradient. Designers shall refer to AS/NZS 2566 for clarification and shall provide detail of this within their design.
  3. The design of anchor or thrust blocks shall be based on the bearing value of the site’s soil conditions, using a minimum concrete strength value of 17.5 MPa concrete. 
  4. A protective non-compressible membrane shall be provided between the pipe (irrespective of the pipe material) and the concrete anchor and thrust blocks to prevent abrasive damage to the pipe and the fitting.
  5. Fastening of the fitting to the Anchor or Thrust Block shall be such to allow for ease of maintenance and replacement of the fitting.

DS-7.7.4   Other Fittings

Approval is required from Council before undertaking detailed design which shall be required at the time of Development Works Approval. Where Development Works Approval is required as part of a Resource Consent, then Council approval shall be obtained at a time required by Council and before construction of the system.


Definitions in this section

Council

Design

Designer

Development works approval

IDC

Principal

Privateway

Resource consent

Street

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