The ERD Valve Tester is specially designed to provide an excellent quality performance and functionality for very specific purposes. The ERD is a high quality apparatus made especially to test components wherein a response is ideally expected at a certain pressure. It is also utilized as a burst tester wherein the user can record the pressure drop from a pressure test. The relief valves, pressure switches, check valves, catheters, safety blocks and more are some of the ideal applications for pressure tests. The valve tester also enables an online testing process for further variation.