| 1415 PROTECTION AND STERILIZATION: Installed pipes shall be adequately protected against damage and deterioration. When handed over the installation shall be clean and in sound condition.
Water supply main and distribution pipes to be used for potable supplies shall be sterilized before using.
1416 TESTING
Water supply and drainage work shall be tested in section as directed by the Engineer after laying and jointing and before being covered up. The test shall be repeated after the pipes are covered up.
The length of pipes to be installed shall be such that they pass tests before and after being covered up. Valves and taps shall be broken down, lubricated and reassembled before final fixing.
Pipelines shall be cleaned before testing.
The water to be used for testing shall be clean potable water. The equipment and testing methods for pipe tests shall be subject to prior approval by the Engineer.
External water service pipes shall be subjected to a hydraulic test pressure of at least two times the working pressure at the lowest point of the pipeline section under test, maintained for a period of one hour.
Drainage pipe work shall be subjected to a hydraulic test pressure of 200mm head over the highest fitting level, maintained for a minimum period of 4 hours.
Internal water service pipe shall be subjected to an air test pressure of 10 Bar, maintained for a period of 15 minutes.
At the completion of testing defects in pipelines shall be made good and taps and valves checked for satisfactory flow and closing.
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