An argon CO2 adapter is used to connect a CO2 regulator to an argon or argon/CO2 welding gas cylinder, allowing for the use of different welding gases without needing a dedicated regulator for each.

An Argon to CO2 adaptor allows you to use a standard Argon regulator on a CO2 gas cylinder by changing the connection type. It screws onto the male outlet of the CO2 cylinder and provides the correct female thread to connect your existing Argon regulator, saving you from needing to buy a second regulator.