6. Conduct the test pressureAfter pumping water into the pipe, the required pressure is reached, then stop the pump and leave for one hour, then continues to pump the water into the pressure value has lost away within an hour. After an hour I repeated steps, plus the amount of water pumped to within two hours we will get the amount of water loss.For pressure 2-4-2 means two hour early we keep pressure is 2 bar, then I lifted 4 bar and hold for two hours, and then finally I lowered 2 bar and keep within two hours
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