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In this task the candidate will perform a hydrostatic test on a section of installed pipe or on a simulated section of pipe the candidate prepares for the hydrostatic test this may mean replacing a valve or valves with a spool or spools the Canada installs a blind hydrostatic pump and pressure gauge please note the Canada is responsible for all installations for the hydrostatic pump even though this video shows people helping the pump is used to fill the lines with water the valves are vented while filling the lines to remove air in the line the evaluator may close the valves when air is cleared from the line if requested to do so by the candidate the candidate then brings the pressure up to the required testing pressure 100 psi is recommended but the pressure must be kept within a reasonable amount for the pipe and fittings used for the test the focus of the task is to ensure the candidate can bring the pressure up and make necessary adjustments to maintain the pressure for 15 minutes once the test is complete meaning that the pressure has held for 15 minutes the candidate is asked to depressurize and drain the system this includes depressurizing to zero and opening vents before draining