The RIDGID 1450 NPT (50557) Pressure Test Pump tests hydraulically for leaks in installations that are required to be leak-proof; it will test systems up to 725 psi (50 bar). The pressure test pump is especially suitable for use in heating, compressed air, refrigeration systems, oil installations, sprinkler systems and other small bore pipe installations. The Model 1450 Test Pump uses a patented variable lever-arm design and automatic pressure holding valves to enable the user to easily pressurize the system.

To use the Model 1450, the system should be completely filled with liquid. Connect the pump to the system with the hose supplied and simply pressurize the system to the desired pressure by pumping the handle. If there is no leak in the system, the pressure (as indicated on the gauge) should not fall during the test period. Pressure is released by opening one valve.