Yes, these are disposible cylinders.
I always take of the torch head when I finish using them. I have had
them leak when shut off, which is not only dangerous, but wastes gas.
Seems the older torches loose the ability to fully shut off. I
finally replaced one that would always keep a very tiny flame on the
tip of the torch when it was shut off tightly.
Someone asked how long they leak. I have had them sputter for several
minutes after I remove the torch. This only seems to happen in cold
weather, which makes me wonder if they develop some ice in the seals.
Bringing them indoors seems to stop the leak (due to the heat), but I
dont care to keep a leaker in the house, so I just let them sit
outside on the lawn where they are not a danger. It seems they
eventually stop sputtering, but I wonder how much gas is going to
waste. There should be some caps made that could be screwed on to
them to completely plug them. I dont mean those plastic covers that
they are sold with, because those do not fully prevent leakage. I
guess those things are only intended to protect the threads.
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