Always keep in mind that helium can be flammable, so you need to work in a well-ventilated area away from any flames.
Push down on the black fill valve at the top of the tank in an open area to disperse any helium remaining in the tank. Let the tank empty out completely.
Turn the valve counterclockwise by hand until it is free from the tank.
Remove the valve from the tank and attach a cap to the top of the tank.
Carl Pruit has been a freelance writer since 2005, specializing in service journalism and travel. His work has appeared on various websites. Born and raised in California, Pruit attended Contra Costa Community College in San Pablo, Calif.…
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