CODE OF PRACTICE FOR SUBDIVISION AND DEVELOPMENT

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Part 6 – Water Supply and Other ServicesWhere the principal water main is to be laid around the corner, then 45º or similar bendsshould be used. Franklin District Council Drawing W1 sets out the general principles,including the positioning of the valves.6.2.6 Water Mains with Fire Hydrants (Principal Mains)GeneralPrincipal mains shall not be less than 100 mm diameter.Pipe Standards and TypesThe following pipes may be used for principal mains, providing they comply with the latestrelevant New Zealand Standard:• Polyethylene PE100 and PE80 to AS/NZS 4130• PVC-U to AS/NZS 1477• PVC-M to AS/NZS 4765• PVC-O to AS/NZS 4441For all plastic pipes, tracer wire shall be taped to the pipe, whether laid by open trenchingor directional drilling.Asbestos cement pipes are not permitted for use anywhere in Franklin District.Concrete lined steel pipes may be required in potentially unstable ground, for lengths ofexposed pipe, or in other special cases, and should be the subject of specific design.Except where corrosive ground conditions exist, concrete lined steel pipes may be laidunder road carriageways and accessways to industrial and commercial premises.Galvanised steel pipes shall not be used.Cast iron pipes may be appropriate for lengths of exposed pipe, or in other special cases.Their use shall require specific approval by the Engineer. All cast iron pipes or fittingsshall be concrete or epoxy lined.Pipe Pressure ClassesPipes for water mains shall be not less than PN12 although a higher class shall be used ifnecessary to provide for the maximum working pressures in the area in which they are tobe laid.JointsJoints for PVC pipes shall be spigot and socket rubber ring type. An approvedbactericidal lubricant shall be used on all joints. Solvent cement joints are not permitted.Joints for PE pipes may be butt welded or use electrofusion couplers or “System 2000”type couplers.Bolts, nuts and washers for flanged joints shall be either 316 stainless steel, with a nickelor molybdenum based anti-galling lubricant or hot dip galvanised. Buried flanged jointsshall be wrapped in densotape.Code of Practice for Subdivision and Development – Edition 5 October 2010 Page 85
Part 6 – Water Supply and Other Services6.2.7 Rider MainsPipe SizesRider mains shall be a minimum 50 mm internal diameter. Table 6.2 sets out thedesirable maximum number of domestic connections which may be permitted to beserved by a rider main. This will depend on the level of service required by the Council,and on Council’s requirements for service connection diameter.TABLE 6.2: RIDER MAINSMaximum Number of Dwelling Units to be ServedHigh pressure areas (1) Medium pressure areas (2) Low pressure areas (3)One-endedsupplyTwo-endedsupplyOne-endedsupplyTwo-endedsupplyOne-endedsupplyTwo-endedsupply20 40 15 30 7 15Note: (1) High-pressure means normal working pressure in the principal mains (other than when fire fighting)usually not below 600kPa.(2) Medium-pressure means normal principal main working pressure usually 600kPa to 400kPa.(3) Low-pressure means normal principal main working pressure usually below 400kPa.Pipes for rider main construction shall normally be either PVC-U to AS/NZS 1477, withspigot and socket rubber ring type joints, or PE80 to NZS 4130.Use of other pipes will only be permitted in special circumstances and will require thespecific approval of the Engineer.6.2.8 Connection of Rider Main to Principal MainWhere a rider main is to be extended at right angles to a principal main, this shall beconnected either with a cast iron tee with a female threaded branch (or an elongatedgibault joint, tapped) and with a PVC valve socket (for a PVC rider main) or with a tappingband.Where a rider main is to be extended along the same alignment, beyond the end of theprincipal main, it shall normally be connected as shown in the Franklin District CouncilDrawing W2.In very soft ground, an additional length of pipe of the principal main diameter, filled withconcrete, may be laid beyond the last cast iron tee. This pipe should be well anchored bycompaction along its length, and terminated with a blank-end gibault and an adequateconcrete anchor block.Taper reducers shall be used only in firm ground where the taper can be adequatelyanchored to the sides of the trench, and with the specific approval or requirement of theEngineer.Code of Practice for Subdivision and Development – Edition 5 October 2010 Page 86
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CODE OF PRACTICEFORSUBDIVISION AND
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Table of ContentsPART 1: GENERAL RE
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Table of Contents3.3.11 Traffic Ser
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Table of Contents7.2.2 Landscape Pl
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Table of ContentsAPPENDICESAppendix
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Part 1 - General Requirements and P
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Part 2 - Earthworks and Foundations
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Part 3 - Roads3.2.2 ParkingFor matt
Page 43 and 44: Part 3 - Roads3.2.4 Requirements fo
Page 45 and 46: Part 3 - Roads3.2.9 Pedestrian and
Page 47 and 48: Part 3 - Roads3.2.13 Standards and
Page 49 and 50: Part 3 - Roadsaccordance with claus
Page 51 and 52: Part 3 - RoadsThe requirements of t
Page 53 and 54: Part 3 - Roads3.3.9 Crossfall on Gr
Page 55 and 56: Part 3 - RoadsPercentage of Materia
Page 57 and 58: Part 3 - RoadsPainted road markings
Page 59 and 60: Part 3 - Roads3.3.16 Dished Channel
Page 61 and 62: Part 3 - Roads(d)A double crossing
Page 63 and 64: (j)(k)(l)Lighting should be conside
Page 65 and 66: Part 4 - DrainageWhere subdivision
Page 67 and 68: Part 4 - Drainage4.2.5 Design Flow
Page 69 and 70: Part 4 - Drainage4.2.7 The Hydrauli
Page 71 and 72: Part 4 - DrainageWhere the pipeline
Page 73 and 74: Part 4 - DrainageHydraulic flow in
Page 75 and 76: Part 4 - DrainageWhere an extended
Page 77 and 78: Part 4 - Drainage4.2.21 Acceptance
Page 79 and 80: Part 4 - DrainageManagement Plan De
Page 81 and 82: Part 5 - Waste WaterThe above desig
Page 83 and 84: Part 5 - Waste WaterJointsAll pipes
Page 85 and 86: Part 5 - Waste Waterand application
Page 87 and 88: Part 5 - Waste Water5.2.9 Ramped Ri
Page 89 and 90: Part 5 - Waste Water22. All control
Page 91 and 92: Part 6 - Water Supply and Other Ser
Page 93: Part 6 - Water Supply and Other Ser
Page 103 and 104: Part 7 - Parks and ReservesPART 7:
Page 105 and 106: Part 7 - Parks and ReservesTABLE 7.
Page 107 and 108: Part 7 - Parks and Reserves7.3.6 St
Page 109 and 110: Part 7 - Parks and ReservesShould s
Page 111 and 112: Part 7 - Parks and ReservesEngineer
Page 113 and 114: Part 7 - Parks and Reserves7.8 FERT
Page 115 and 116: Part 7 - Parks and ReservesShrubs s
Page 117 and 118: Part 7 - Parks and Reservescommence
Page 119 and 120: Part 7 - Parks and Reserves7.14.6 T
Page 121 and 122: Part 7 - Parks and Reserves• Main
Page 123 and 124: Part 7 - Parks and Reservessuitable
Page 125 and 126: Part 7 - Parks and Reservesand othe
Page 127 and 128: Part 7 - Parks and ReservesSpraying
Page 129 and 130: Part 7 - Parks and ReservesTABLE 7.
Page 131 and 132: Part 7 - Parks and ReservesITEM REG
Page 133 and 134: Part 8 - Power, Telephone and Gas8.
Page 135 and 136: Appendix AStatement of Professional
Page 137 and 138: Appendix BDesign Certificate - Land
Page 139 and 140: Appendix CCertified Development Che
Page 141 and 142: Appendix EElectronic As-Built Requi
Page 143 and 144: Appendix GStandard Detail Drawings
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CODE OF PRACTICE FOR SUBDIVISION AND DEVELOPMENT

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