Its the same, but please don't do what I am feeling you are wanting to do. I am only saying that because when someone asks a question like that it usually means some very imaginative gears are turning rather fast in someones head, LOL. Sorry, these darn dappy daps make me think that way, hehehe!
Lol, no imaginative gears turning here. I have a mate who swaps out fire extinguishers when they hit the expiry date. Bought a co2 reg. and been using them for over 6 months, just thought I'd ask, l bet you thought l was going to dowse them in co2 didn't you bad boy, lol