ON/OFF Control Valve for Safe and Fast Refills Features an integrated ON/OFF control valve to prevent gas leakage during connection, ensuring safe and efficient operation. Allows you to easily start or stop the filling process at any moment, giving you complete control and improving safety. Designed for quick attachment to large propane tanks, enabling refills in approximately one minute. Easy Connection to Multiple Tank Sizes Equipped with a handwheel handle for secure tightening, making it simple to connect a large steel cylinder to a 1 lb propane tank without tools. ON/OFF valve function lets you halt the filling process instantly if needed, minimizing risk and improving convenience. Quick Gas Monitoring Enables rapid checking of gas levels in your large tank before refueling, helping you avoid interruptions caused by insufficient gas supply. Simplifies refueling preparation by ensuring you have enough gas available before starting the transfer. Durable Solid Brass Construction Made from strong solid brass for sealing performance and longlasting durability. Resistant to wear and corrosion, suitable for use in a wide range of environments. Integrated safety features help prevent overfilling, protecting your cylinders and equipment. Ideal Use Scenarios 1. Refilling small portable propane cylinders from a larger tank for camping stoves, portable grills, or heaters. 2. Transferring propane from your backyard grill tank to a small cylinder for RV appliances or outdoor gear. 3. Maintaining gas supply for emergency backup heaters or other propanepowered tools by quickly topping up small tanks. Specifications Material: Solid brass Function: ON/OFF control valve with handwheel tightening handle Compatibility: Large steel propane tanks and 1 lb propane cylinders Application: Safe, quick transfer of propane between compatible tanks Performance: Fast refill capability, strong sealing, reliable safety control