The procedure for the water test shall be as follows:(a) The pipeline shall be filled with water and shall be kept filled for two hours before testing starts to allow absorption to take place.(b) The test pressure of 1.2 m head of water above the soffit of the pipe at the high end shall be applied at the standpipe and maintained for 30 minutes. The test pressure applied shall not exceed 6 m head of water at the invert of the low end of the pipe.(c) The head of water at the standpipe shall be topped up at 5-minute intervals during the test, and shall be filled to the specified head at the end of the test period. The amount of water added to the standpipe shall be measured using the measuring vessel.(d) The leakage of water from the pipeline shall be measured as the amount of water added to maintain the specified head of water.