#mpdryrisers

For dry risers this normally entails connecting the inlet to a pump and water supply. The system is then completely charged with water to a pressure of 10 bar measured at the inlet for a period of at least 15 minutes. During this period an inspection is made to ensure that there is no leakage of water at any of the joints or landing valves. Once the pressure test is completed the system must be drained so that it is left ready for immediate use. In the event of system failure due to inability to hold pressure for the recommended 15 minutes at 10 bar (at the inlet), a retest will be required.