Butane refill adapters from US brands and US-based sellers

What to look for in a good butane refill adapter

• Check the valve material. A brass or steel valve pin holds its shape refill after refill, while a plastic or pot-metal one wears down and starts leaking gas around the stem within a few uses.
• Look at the gasket. The rubber O-ring is what actually stops butane from hissing out during a refill, and cheap adapters use a thin, brittle ring that cracks after a couple months instead of a thick, replaceable one.
• Test the nozzle fit. A well-made adapter locks onto both the can and the lighter with a firm, snug click, while loose-tolerance knockoffs wobble on the threads and let gas escape sideways.
• Read the price as a signal. Verified sellers in this category run about $8 to $50, so anything priced well under that range is usually cutting corners on the seal or the metal to hit a rock-bottom number.