Hydrostatic Pressure Test Pumps & Digital Hydro Testing, Liquid and Gases: Custom build or standard pressure equipment models available. Hydrorex design and manufacturing HPU pressure test units with highly regarded, safe, durable and easy to operate. Your online store for all Hydrostatic high pressure systems up to 60,000 Psi, chart recorders, hoses, valves, pumps and more. Pressure Shop.Com delivered with the shortest leadtime. Houston TX. USA.