British standard portable outlet

British Standard Portable outlets (Also referred to as couplers)
are used in cases where the existing medical gas
infrastructure does not fully answer the medical facility's needs.
These cases include extension hose assembly for ceiling gas outlets,
adapters between different medical gas outlet standards,
outlet Y fitting, and portable pressure regulators.

British Standard Portable Outlets are available
in 4 gas types: oxygen, Air, Vacuum, and Nitrous Oxide.

These outlets are with  1/4" NPT connection.