The OPW 10P-0150 10 Plus Single Poppet Emergency Shut-Off Valve has 1-1/2" NPT thread connection. Designed to protect your customers, investments, and the environment against the potential hazards of undetected shear groove leaks caused by low-impact incidents. The patent-pending SmartGuard™ design contains shear groove leaks, preventing fuel from leaking into sumps to help reduce the risk of fire, explosion, personal injury, property damage, environmental contamination, product loss and costly clean-up.