20 Pound BBQ bottles are equipped with Acme QCC Valves. They are designed for ease of connection and increased safety. The Acme valve will not flow propane without this fitting in place. The Acme QCC Fitting and connection comes in different flow sizes. The inner port size is the difference. 100,000 - 250,000 - and 450,000 BTU sizes are common. A Standard BBQ fitting is good for about 100,000 BTUs. However pay attention to your needs when purchasing a fitting. While the quick change BBQ hose is designed with a Check Tee Fitting the ball valves are there so I can be sure to avoid propane leaks. Notice how the gas hoses are approved and labeled as such.
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