What if the tool is accidentally inserted into a non-empty cylinder?
The propane will be released into the surrounding air at a controlled rate, with a full cylinder becoming empty after approximately 45 minutes. That is why it is important that a propane cylinder be used with a propane appliance first to ensure it is empty before inserting the Green Key® tool. It is also why the Coleman label says to use the Green Key® tool in a clear and open outdoor area, away from open flames or other sources of ignition, tents, buildings and other structures.
