Alpenflow Fuel Transfer Valve by Alpenglow Gear

Ships in 1-2 business days | Based in Redwood City, CA | Est. 2021 Transfer fuel between canisters with a device that weighs less than a penny The Alpenflow Fuel Transfer Valve is an ultralight little gadget that saves weight and waste. The Alpenflow was dreamt up by Alpenglow founder Tom (a.k.a. "Gadget") along the Pacific Crest Trail after seeing piles of semi-filled fuel canisters in hiker boxes. Consolidate your stash, split fuel with friends, or score a free boost from a hiker box. It&&';;s so light that even the gram counters will consider it worth its weight to bring. How to Use 1. Warm your donor canister and/or cool your recipient canister This transfer requires a pressure difference to push the upper liquid fuel down into the lower canister. The donor canister can be warmed in the sun: never use an oven or flame The larger the temperature difference, the faster the transfer will occur 2. Place warm canister on TOP, cool canister on BOTTOM (no threading needed) 3. Ensuring the stack is vertical & aligned, press down hard for 5 - 10 seconds 4. Repeat as needed, especially if filling a near-empty lower canister. Once the warm donor fuel mixes & warms the lower liquid fuel sufficiently, the transfer will slow & eventually stop. Please read the instructions and safety warnings to understand risk when using. _______________________________________ Specs Sizing: 1" dia x 0.7"h | 24mm x 1.7mm Compatibility: All threaded isobutane canisters Weight: 0.09oz | 2.4g Materials: Valve: Nylon Black Foam: NBR (nitrile-butadiene rubber) Made in the U.S.A. This product has been stress-tested by Backpacking Light _______________________________________ Warnings & Safety: To mitigate the risk of liquid butane expanding when canister is heated, never fill beyond the original fill level (~80%). Fill level weights to aim for: Small 4oz fuel: 7oz | 200g Medium 8oz fuel: 12.7oz | 360g Large 16oz fuel: 23.6oz | 660g Fuel canisters do not meet D.O.T. requirements for commercial transportation after refilling (a.k.a. it&&';;s illegal for businesses to transport refilled canisters) Never use a flame or oven to heat canisters Never fill canisters with pure propane, and only transfer "winter mix" fuel (70% butane / 30% propane) into canisters rated for winter mix fuel.