All watermains and connections shall be properly cleaned, tested and disinfected before connection to an existing watermain 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
- All detritus is to be removed from the pipe by flushing.
- The main shall be flushed through suitable hydrants and scour valves from upstream to downstream.
- Pipes larger than 200mmND shall be swabbed.
- The Engineer will issue a certificate that records the date, location and length of pipeline disinfected.
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.
Definitions in this section