Due to many many request worldwide and dozens and dozens of e-mails we wrote. Here some pictures how to open the Draeger fitting from Dolphin/Ray regulator.
And also how to open the OXY2 lower fitting to change it
Of course, you do everything at own risk. We are not responsable for any damage!
On the pics for the first stage opening we used an adapter, also possible is to use the tank valve to fix.
On bottom of page some hints to new Draeger first stage