Easy installation with 3/4 in NPT thread: Standard 3/4 in NPT thread for straightforward mounting on compatible water heater systems. Prevents overpressure with 150 psi rating: Rated to 150 psi, it activates to protect your water heating system from dangerous pressure buildup. Brass construction: Made from certified brass, this valve meets safety standards for reliable water system operation. Reliable spring loaded operation: Spring actuated mechanism provides dependable pressure relief when needed, protecting your heating setup. Use scenarios Residential water heater installation: Fits standard 3/4 in NPT connections on common household water heaters, providing reliable overpressure protection. Replacement or retrofit: Suitable as a replacement valve in existing water heating systems to restore or upgrade overpressure protection. Systems with variable demand: Useful in setups that experience pressure fluctuations or demand periods, helping prevent pressurerelated issues.