that's because the mythbuster guys are a bunch of amatuers, you're supposed to put a roadflare next to it to ignite it when it goes poof... sheesh, kids today... :rolleyes::p
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The newer tanks for gas grills, the 20LB variety, have been outfitted with new valves called OPD. Overfill protection device. The old way to fill a tank was to weigh it and fill it up to a certain weight. Great if you can do the math. The new valves prevent you from overfilling the tanks. The liquid is around -45 degrees below zero. I have seen what it does to your skin. Ouch!
I appreciate all of the help here. Thanks! I have not found anyone to recycle the tanks, but have found many who will dispose of them. I will look into refilling them.
I have also found that walmart will take it on the exchange system that they use. But I would check with them.
Yes - WalMart works with Blue Rhino. They'll take your old-style tank in exchange for a full tank with the new OPD valve. Blue Rhino takes the old tanks, removes the old valve, recertifies the tank, installs a new valve, fills the tank, and puts it back out in their sales points (i.e., WalMart).
Back when Blue Rhino was expanding, they'd take the old-style tanks for free. Now they'll only accept them as an exchange.
I'm not sure about other places, but where my son works, the container HAS to have that over fill valve on them or he can't fill it .
Opalsns