came with European gas bottles, regulators and hoses. Since arriving in the USA we have replaced them with US bottles (swap and go), a gas detector and solenoid. I have had to join a US hose to a European hose to join them up as the US hose does not fit the nozzle in the locker. The fitting is a left hand thread female, the pipe has a male with rubber ring inside a nut. The OD of the threaded part is 13mm (1/2") I am wondering what the pipe end fitting is called and its specification, there does not seem to be an adapter readily available, most hardware
guys just shake their head
. I want to tidy up the connection and not have a joined hose.