On May 5, 10:06*am, bumper wrote:
If the tank is "portable", and you will be having it hydro tested
locally, I suggest NOT using a welding supply place unless they test
on-site. If they throw a bunch of bottles in a truck to send off for
testing, your nice bottle will not come back looking the same.

bumper

Yep, welding supply shops can be tricky.

Once I was on a errand to pick up a refilled (large type) O2 bottle.
While I waited for my turn at the counter, I noticed a truck being
unloaded at the dock. It was loaded with green O2 bottles - none of
which showed the blue "Aviation Oxygen" sticker.

Since I couldn't see any Aviation Oxygen bottles, I told the
counterman I wouldn't be surprised if he couldn't fill my order. "No
problem", he said, "Watch". He opened a drawer, retrieved a sheet of
blue Aviation Oxygen stickers and slapped one on the nearest green
bottle. "Now, he said, "I can sell you an Aviation Oxygen bottle -
that will be $115." "How much would it be without the sticker?"
"$35", he said.

It's surprising how honest people can be at times.