This Lochinvar pressure relief valve is designed to provide safety measures in heating systems by releasing excess pressure and temperature. The valve operates at a maximum pressure of 150 pounds per square inch (PSI), ensuring that the system does not exceed this limit. It is equipped with Temperature and Pressure (T & P) relief mechanisms, which are activated when either the temperature or pressure within the system surpasses safe levels. The valve then opens to release the excess, preventing potential damage or failure of the system. This Lochinvar product is made from durable materials for long-lasting performance and reliability in various heating applications.