[Sapperwhite]

I thought it was a myth too.....

These pics of affected tanks with "blue" valves are found on alot of rural drug enforcement agency websites. There is even an alert on a propane gas site. I guess if the meth cook notices that his gear is deteriorating, he knows he can go exchange for shiny new gear. Are they doing it though???

National Propane Gas Association Anhydrous Ammonia and Propane Cylinders Alert