Horynar Butane Refill Adapter 4-Pack — Exhaust Pressure Button & Automatic Shutoff for 454 g Propane to Butane

Horynar Butane Refill Adapter lets you safely transfer fuel between 1 lb propane cylinders or EN417 Lindal-valve canisters and smaller butane/isobutane canisters using an adjustable exhaust-pressure button for controlled fills.

Designed for campers, outdoor cooks, and anyone who wants to reuse or refill portable gas canisters, this 4-pack of Horynar adapters converts larger 1 lb propane tanks (not included) and compatible Lindal-valve canisters into a source for smaller butane/isobutane canisters. The kit includes an inflation valve with a side exhaust pressure button to reduce internal pressure during transfers, an automatic shutoff mechanism for safety, and a compact zipper pouch for storage and transport. It’s intended to make refilling faster, more efficient, and less wasteful while helping you avoid buying new disposable canisters as frequently.

How does the exhaust air pressure button improve refills?

The exhaust air pressure button allows you to relieve trapped air from the receiving canister before or during refilling, which lowers internal pressure and enables a denser, faster gas transfer. That control helps the adapter collect more fuel in each transfer session and reduces backflow or spitting during connection.

• Relieves excess internal pressure for safer fills
• Enables faster and more complete gas transfer
• Reduces fuel waste by minimizing trapped air

Is the adapter safe and does it prevent leaks?

Safety features are built into the Horynar refill adapter: an automatic shutoff closes the valve if the gas saver valve isn’t properly connected, minimizing the risk of leaks. The adapter’s threaded swivel connection and valve design are intended to form a secure mating with compatible canisters when used correctly.

• Automatic closure if the connection is incomplete
• Swivel-to-connect thread for a tight seal
• Recommended for use only with appropriate, compatible cylinders

Which tanks and canisters are compatible with this adapter?

The adapter is made to work with standard 1 lb (16 oz) propane cylinders and common EN417 Lindal valve isobutane/butane canisters. Note that the source cylinder must be empty before attempting to inflate a smaller 16 oz cylinder to avoid unsafe pressure conditions; follow manufacturer guidance for the gas types you use.

• Connects to 1 lb propane tanks (not included)
• Compatible with EN417 Lindal-valve canisters (not included)
• Check your canister valves and gas type before use

How easy is it to carry and store for outings?

The kit includes a small 4-inch carry bag so you can keep the adapter set together and avoid losing pieces while traveling. Each adapter is compact and lightweight, fitting easily into a camping gear pouch or kitchen drawer when not in use.

• Compact 4-inch storage pouch included
• Lightweight adapters pack neatly with camping gear
• Four adapters per pack to share or keep spares

Who is this for? The Horynar Butane Refill Adapter is intended for outdoor enthusiasts, backpackers who use portable stoves, homeowners who prefer refilling over single-use canisters, and anyone who wants greater control when transferring fuel between larger propane tanks and smaller butane/isobutane canisters. It’s best for users familiar with gas handling and who will follow safety steps: ensure source cylinders are compatible, empty receiving 16 oz cylinders before inflating, and use the exhaust button and automatic shutoff features as instructed. This product helps reduce single-use waste, makes fuel transfers more efficient, and provides extra adapters so you can keep spares on hand.