Re: What outdoor items do you have the hardest time recycling?

The Lindal valve of isobutane canisters was not designed for long-term use that refilling canisters would require. 
Releasing the pressure of a canister with a ‘crunch-it’ type tool and recycling are the best we can do.

I’d like to see any store that sells isobutane canisters accept empty canisters and recycle them. REI could lead the way. 

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Re: What outdoor items do you have the hardest time recycling?

To recycle isobutane canisters the leftover fuel must be emptied then the pressure released with a ‘crunch-it’ type tool. 
We weigh our canisters with an inexpensive kitchen scale before using and then after each trip to see how much fuel is left so usually we empty the canister cooking. Canisters with too little fuel for backpacking become car camping canisters. 
If a minute amount of a few grams is left, not worth cooking with, then that fuel must be burned off; just light the stove and in seconds the canister is safely emptied. The burned amount should be tiny, insignificant, but imperative for safely recycling. 

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