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- 1 decade agoFavorite Answer
as with batteries these must by federal law be disposed of by the local recycle center in your area, you may call them or try to find that on line at www.recycle.com/Propanetanks / Most of these can even be refilled if not to old and may be returned where you would fill the large one for your grill
Source(s): Hope this helps ya - 1 decade ago
throw them in a fire and stand REALLLLLY close..... No just kidding call the manufactuer and ask them
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