A hydraulic test pump is a specialized pressure-testing device used to check the strength, integrity, and leak-tightness of pipes, pipelines, pressure vessels, boilers, valves, hoses, tanks, and other pressure-containing equipment. It works by filling the system with a liquid—usually water—and then increasing the pressure to a predetermined test level. Hydraulic testing is widely preferred because water is nearly incompressible, making it considerably safer than testing with compressed air or gas.
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