I have a few of these old Sears disposable oxygen tanks that I would like to use as receivers for a small compressor I'm building (for an airbrush & other small stuff). The bottles were originally pressurized to 2500 psi, but I'll only be using them at about 80 psi.
Anyway, the outlet fittings are just about impossible to remove. I tried heating a bottle with a torch, then rapidly cooling the brass part with canned air (held upside down so it's super cold). No dice. Couldn't budge it.
So now I'm wondering if I should just find some female fittings to connect up. I can't identify what type they are, though. There's a Schrader valve in the middle but they don't look like anything in my industrial catalogs or that I've Googled.
Any ideas?
If I can't find matching fittings, I'll just cut them off with the chop saw, drill out the remainder and weld threaded bosses in place. I'd rather not go to the trouble though.