All watermains and connections shall be properly cleaned, tested and disinfected before connection to Council reticulation in accordance with CS-9.6.1 Cleaning and CS-9.6.2 Disinfection.
After any water main has been constructed, tested and disinfected, it shall be kept continually charged with water and kept under pressure. The pressure shall be maintained while other underground services are being laid in the vicinity of the main and until the main is commissioned
Prior to pressure testing and subsequent disinfection, all pipes, valves, service connections and other fittings shall be flushed and then cleaned of dirt and pipe shavings using an appropriately sized foam swab (for pipes equal or greater than 50mm internal diameter).
If Council reticulation is used for flushing, a reasonable estimate of water used shall be forwarded to Council for the purpose of recording water loss information.
- After backfilling, flushing and successful testing, and before being put into service, all pipes, valves, house connections and other fittings shall be disinfected. The method to be adopted shall be as per Council's disinfection requirements detailed in IT-7 Water Supply.
- The Engineer will issue a certificate that records the date, location and length of pipeline disinfected.
- Once the FAC test has been passed and the pipe length flushed, the pipe length must not be emptied at any point but may be depressurised for additional sterilization. The pipe must not be depressurized for more than 5hrs.
- When flushing the super chlorinated water from the tested main, the water shall be dechlorinated before discharging. This includes to the ground, an open water course or a stormwater network.
Definitions in this section