Yes, I do know that because when I get them filled after I empty them, they fill at around 4.5 gallons. They don't fill by weight around here.
When brand new tanks cost over $30 plus you still have to pay to fill it, why is $24 (including sales tax) for a new tank AND some gas in it a bad deal?? (yes, I know they probably only have 3 gallons in it) Takes all of 5 minutes for the deal and re-cert tanks are only good for another 5 years I think and I don't see as many places that re-cert as I do the exchange places or refill stations.
Anyway, it's what works for me and perfectly legal and environmentally responsible so that's my reasons.
Mitch
