With the pressure control valve, the pressure level can be fixed to the desired value. The water test pressure does not exceed this fixed value. The pressure regulating valve is also equipped with a check valve which prevents back pressure of the pressurized water and ensures that the pressure remains constant in the test process. Test of natural gas, oil pipelines, Test of water pipelines, Hose, steel pipe, Test of fluid carrying lines, Water tanks, central heating boilers, Steam boilers test, Testing of all types of equipment under high pressure,