AlpenFlow Fuel Transfer Valve

AlpenFlow Fuel Transfer Valve

The world's lightest tool for moving fuel between canisters – now in the redesigned Saturn version. Split a large canister into smaller ones at home, siphon fuel from half-empty canisters, or completely drain a canister before recycling it. All of that with a tool that weighs just 3.1 grams. A temperature difference between the canisters allows liquid fuel to flow from the warmer donor canister (on top) into the cooler recipient canister (on bottom).

Born on the Pacific Crest Trail in 2023, the AlpenFlow was designed after witnessing piles of half-empty, rusting fuel canisters left behind in hiker boxes. With this tiny yet mighty device, you can share, borrow, or consolidate fuel, ensuring every drop gets used.

The updated Saturn Design builds on the original with several thoughtful improvements inspired by thousands of miles of trail experience. Instructions are now molded right into the body, there's a lanyard loop so you can attach it to your stove kit, and a wider outline makes it easier to hold, use, and find at the bottom of your pack.

💡 Prefer to save a few grams and euros? The Original AlpenFlow (2.4 g) works exactly the same, just without the Saturn's practical upgrades.

WEIGHT: 3.1 grams (0.11 oz) Saturn version, 2.4 g (0.09 oz) Original version

SPECIFICATION

• Compatible with threaded isobutane canisters (EN 417 standard)
• Designed, molded, and assembled in California, USA
• Covered by U.S. Patent 12,613,007
• Uses a temperature difference between canisters to drive the fuel transfer

How to use it

Cool Your Recipient Canister (or Warm Your Donor Canister)

• The transfer requires a pressure difference to push liquid fuel from the upper canister down into the lower one
• The preferred way is to cool the recipient canister (e.g. in a refrigerator). Warm the donor canister only if cooling the recipient isn't possible – in the sun, never with a stove, oven, or flame
• The larger the temperature difference, the faster the transfer will run

1. Place Warm Canister on TOP, Cool Canister on BOTTOM (no threading needed)
2. Press Down Hard for 5 - 10 seconds
3. Wait 30 - 60 seconds, then Repeat as Needed, especially if filling a near-empty lower canister. The pause lets the foam seals thaw and rebound.

• Once the warm donor fuel mixes with & heats the lower liquid fuel sufficiently, the transfer will slow and eventually stop.