Originally Posted by tkasten
Like someone above stated - I drilled a hole in the bottom collar of each tank and then used heavy duty stainless locks (keyed the same) to lock them to the tank holder ring. I'm sure a determined crook could cut through the lock shanks but it would take awhile.
The owner of my favorite Airstream dealership tried to describe the method that you have employed on your coach. I will be off to one of the big box stores for a pair of stainless padlocks for my tanks on the Overlander . . . and when I purchase new tanks for the Minuet, these locks will also be purchased for it as well.
There are identification numbers stamped into the Worthington tanks, but it is a process to track them down and I think that I have encountered a deadend. I had hoped that the recertification numbers and tank ID numbers might be on paperwork at the dealership since it wasn't on the invoice from when the dealer handled OPD valve installation and recertification. I have now recorded the identification numbers on my Airstream tranks, taken digital photographs, and recorded the numbers in my owner's manual.
I will say this, Ace Fogdall RV (Cedar Falls, Iowa) went the extra mile for me and looked up all the paperwork from 2003 when they had gotten the tanks recertified for me.