The Flame King 5lb OPD Valve is a safety device for 5-pound propane cylinders that prevents overfill by automatically closing at an 80% liquid level. UL Listed and built from high-quality premium materials, it supports safe, code-compliant refilling for grills, campers, and portable appliances. Compatibility: Designed for 5-pound propane tanks with an OPD (Overfill Prevention Device) connection. Overfill Protection: Automatically closes when the liquid level reaches 80% of the tank capacity to prevent overfill. Certification: UL Listed for safety and reliability. Materials: Constructed from high-quality premium materials to enhance durability and safety. Applications: Ideal for use with 5-lb cylinders in grills, camping gear, and other portable propane-powered appliances. Regulatory Guidance: Important safety note that the purchaser must ensure the part is proper for the application and complies with applicable codes and standards (CGA, NFPA, CFR 49, Transport Canada). This valve enhances safety by limiting propane fill to a defined 80% threshold, reducing the risk of pressure buildup and leaks during refilling. It provides confidence for both DIY enthusiasts and professionals by aligning with recognized safety standards and offering a clear, enforceable fill limit. For best results, pair it with the appropriate 5-lb cylinder setup and verify compliance with local and national regulations before installation. Ships from supplier: Flame King Products