Testing between two manholes by water without pressure is a test for any possible leakages or cracks in pipeline.
We need two pipeplugs, water tank and compressor for the test.
Pipe plugs must be selected in proper diameter that is suitable for pipes. Plugs are placed to pipe from two adjacent manholes and must be fixed to wall of manhole to provide safety working.
Then plugs are inflated till working pressure. Once plugs are inflated, manhole is filled with water.
After filling water to manhole, wait a while to observe if there is any change in water level.
If there is no change in water level, it means there is no leakage or crack in the pipeline. But if water level decreases it means there is crack in the pipeline.
When the test is completed, water in the manhole is discharged by the water tank. Plugs are deflated and displaced from the manholes.

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