Alpenglow Gear - Alpenflow Fuel Transfer Valve (UPDATED)

This is the world's lightest tool to transfer fuel between canisters! You can split larger canisters at home, siphon from half-full canisters, or even drain a canister before recycling-- all for 3.1 grams (0.11 oz).

By creating a temperature difference between the canisters, liquid fuel will flow from the donor (on top) to the colder recipient (on bottom). 

Saturn Revision: This updated version includes feedback from thousands of trail miles: instructions, a lanyard loop, and a wider outline are all now baked into the body so it's easier to use, keep, and find.

Tips & Warnings:

• Never use a stove, oven, or flame to heat the donor can. Warming the donor canister should only be performed if cooling off the recipient isn’t possible. 
  
• Only transfer butane, isobutane, or a winter blend (up to 20% propane)
• Never fill past the original canister's fill level (~85%)
• Please wait 30-60 seconds between applications to allow the foam seals to thaw and rebound. Immediately transferring without pause can lead to torn and permanently crushed seals. 
  
• Fuel canisters are illegal to fly with even if empty
• For personal use only: USDOT 49 CFR §178.65 bans the transportation of refilled disposable canisters for commercial purposes in the United States