JadeMonkeyStang
Well-Known Member
If your local gas supplier doesn't swap your cylinders out and just refills them, then hydro testing of your cylinders will come into play. I believe a a steel cylinder is good for 10 years before it needs to be re-hydro tested while an aluminum cylinder is only good for 5 years. Hydro testing is really cheap though (normally $10-$25 depending on who does it) so it's not really a big deal.