How to refill backpacking stove fuel canisters with butane | Cheap & Easy

I show a cheap & easy way to refill a standard (EN417) camping fuel canister with butane. Modern canisters are typically sold with an 80% butane / 20% propane blend, which lowers the boiling point of the mixture to approximately -6 Celsius at standard atmospheric conditions (i.e. sea level). That's why these canisters aren't very good in extremely cold temperatures (i.e. -15C or colder). A better cold temperature option is a liquid fuel stove, like the MSR Whisperlite. In this video I show how to refill a canister with pure butane, which is readily available in many sporting and hardware stores. Actually it's a blend of normal butane and iso-butane, which are almost chemically identical. Since butanes boils around 0 degrees Celsius, these canisters are only good for summer. In winter butane will almost always be in its liquid phase at sea level, so a pure butane blend would be useless.. Note: The modern EN417 canister is designed to a European Standard applicable to cartridges with a total capacity of between 50 ml and 1 000 ml, designed to contain liquefied petroleum gas or stabilized mixtures of liquefied petroleum gas with propadiene and/or methyl acetylene and/or di-methyl-ether or equivalent, where the pressure developed by the contents of the cartridge at 50 °C does not exceed 13,2 bar (13 atmospheres). These cylinders easily contain the pressures that result from using 80% butane / 20% propane, so it's perfectly safe to fill one with pure butane. The vapor pressure of butane is approximately 2 times lower than an 80/20 mix of butane & propane. Each canister should only be refilled 3-4 times. After that the seal can become compromised. ------------------------------------ 0:00 Introduction 1:36 Butane vs. propane 3:48 The adapter and valve 7:56 Costs 9:05 Step-by-step procedure 15:12 Testing the fuel with a BRS3000 16:25 Closing comments #Martyupnorth #CampingStoves #Backpacking