The B Size Reverse Flow Check Valve from Western Enterprises is an essential component for fuel gas applications, designed with a left-hand male connection for seamless integration into your welding and gas systems. This robust check valve prevents backflow, ensuring safe and efficient gas flow, making it a reliable choice for both professionals and DIY enthusiasts in the welding industry. Please note that this product may expose users to lead, a substance recognized by the State of California as a potential cause of birth defects or reproductive harm, and further information can be found at www.P65Warnings.ca.gov.