Originally Posted by Spartan1979
The only time I exchange is when a tank is out of test.
most places here aren't to picky about checking propane certs, but old nasty yardsale tanks can be had for a couple dollars attached to a grill and those tanks go right to the exchange.
You have to be careful with blue rhino. They have 2 valve styles OPD and TS2
TS2 valve have a steel check valve that needs to be held back with a magnet when filling.
I don't think blue rhino is still making them but some are still floating around