- Where principal or trunk main are laid "across country" or not parallel to boundary lines, the location of the water main is to be marked by a H4 treated timber post measuring 50mm x 150mm or a standard concrete valve/hydrant post without the H or V. All posts shall be painted white. The marker post shall be placed above the pipe at no more than 100m intervals, at changes of direction or where the pipe crosses fence lines.
- All open cut installations shall include warning / detection tape to be laid in the trench 300mm above the top of the pipe. This to be laid after the second layer of bedding has been compacted. Refer to AM-5 Stormwater Approved Materials, AM-6 Wastewater Approved Materials and AM-7 Water Supply Approved Materials for tape type.
- All non metallic pipes installed by trenchless technology shall have a tracer wire strapped to the pipe and fixed thereto by using a minimum of 2 complete wraps of 50mm wide heavy duty adhesive tape at a maximum of 3.0m intervals. The wire shall have some slack to allow for bends in laying and for future installation of tapping saddles, which shall be placed under the tracing wire. Refer to: AM-5 Stormwater Approved Materials, AM-6 Wastewater Approved Materials and AM-7 Water Supply Approved materials for tracer wire type.
- Wire traces shall be continuous between valves and hydrants to allow a continuous electrical current and shall be anchored to that fitting below the box lid to enable ease of connection. The tracer wire shall be long enough to extend 600 mm minimum above ground level when uncoiled (refer to T713 & T716). The excess length shall be neatly coiled in the valve or hydrant box.
- The tracer wire shall be tested for continuity between surface boxes using an electronically generated tone and detector probe or alternative approved method. The ends of the wire are to be sealed in a water tight manner to prevent the wire from corroding.
Definitions in this section