This Lochinvar relief valve, known as the FVX-5 T&P model, is a safety device designed to release pressure and prevent potential damage to the system. It operates at a pressure rating of 150 pounds per square inch (psi), ensuring that it can handle high-pressure environments. The valve is designed to open when the internal pressure exceeds the set limit, thereby releasing excess pressure and preventing system failure. This model is specifically engineered for use in heating systems and water heaters, providing an essential safety measure in these applications. The FVX-5 T&P relief valve from Lochinvar is recognized for its robust construction, reliable performance, and long service life.