Designed for use in fuel gas applications, this reverse flow check valve from Western Enterprises ensures reliable performance and safety. With a B-size left-hand female connection, it effectively prevents backflow, making it an essential component for welding and gas systems. Please note that this product may expose users to lead, which is recognized by the State of California as a potential cause of birth defects or reproductive harm. For further information, please visit www.P65Warnings.ca.gov. This valve is a crucial addition for professionals seeking dependable fittings and adaptors in their welding and gas equipment setups.