This test will be set up and conducted by site supervisor and the procedures in brief are as follows : –
1. Before test, the ends of the pipeline are plugged using expanding disc stoppers and one end is connected with a U-tube manometer.
2. Air is to be pumped into the pipeline until a test pressure of slightly more than 100mm of water is observed in the U-tube.
3. Allow a few minutes for stabilization of the ambient temperature, then adjust the air pressure to 100mm of water in the U-tube. Lock the device without further pumping.
4. After the five-minute test period, read the pressure in the U-tube and record.
5. It is satisfactory if the air pressure remains above 75mm head of water at the end of the air test.