Secure airtight connection: provides a safe, airtight link between older propane tanks and modern QCC1/Type1 hoses and regulators, enabling reliable fuel delivery for a range of outdoor applications from grills to pits. Conversion compatible: allows conversion from old tanks to modern QCC1/Type1 hoses and regulators, supporting efficient and accessible use of propane across compatible appliances. Outdoorfocused design: intended for outdoor settings with larger fuel sources, ensuring a steady supply of propane for cooking and heating. Versatile for outdoor enthusiasts: suitable for BBQs, camping, and propane heaters, making it a practical tool for any propanepowered appliance user. Key benefits at a glance: Function: secures an airtight, safe connection between old tanks and modern regulators. Compatibility: works with older propane tanks and modern QCC1/Type1 hoses and regulators. Performance: enables efficient fuel use and dependable propane supply for outdoor cooking and heating. Use with larger fuel sources: supports extended outdoor cooking and heating setups. Use scenarios: 1) Home backyard: connect an older propane tank to a modern grill or smoker using a QCC1/Type1 regulator for safe, reliable operation. 2) Camping or RV trips: link a portable stove or heater to a larger propane source to ensure continuous cooking and warmth while outdoors. 3) Outdoor events or tailgating: supply propane to multiple grills or a central pit from a larger fuel source, simplifying outdoor cooking and heating needs.