I use oxygen and propane occasionally in my garage (part of my house). Not that happy having the propane there, even with flashback arrestors on the regulator. I'd like to drill a hole through the cavity wall and stick the propane at least outside, but not sure how's best to do this, where to site the regulator etc. I noticed a domestic propane cooking installation recently which consisted of a wall-mounted regulator (looked like it!) and a short hose connecting to the cylinder. Presumably the cook doesn't come outside every time they cook and shut down the cylinder and regulator! Would this be a suitable setup, maybe just with a gas cock inside the building? Or other suggestions?