Originally Posted by Jim Schings
Actually.. yes. It doesn't have to do with the OPD valve requirement. Blue Rhino uses their own TS2 (Tri-Safe II) OPD valve on the majority of their cylinders that can not be re-filled by normal propane suppliers. It requires a magnetic key that must be inserted into the indentation in order to hold a steel ball out of the way.
Directly from Blue Rhino:
"Blue Rhino is the leader in the industry for providing the safest tanks on the market. Some, but not all of our tanks have a special safety device that prevents the refill by anyone other than a Blue Rhino specialist. They are called TS2 cylinders. The reason we designed them is simple. It's for the safety of our consumers!! We stand behind our product. We know how our cylinders are filled and that the highest level of accuracy and safety checks are performed. When our consumers take our cylinders and have them filled elsewhere, we cannot be liable or guarantee the safety of that cylinder. If your tank is not properly filled, damage to your valve can result, which can prevent it from performing properly.
Our business is propane cylinder exchange. We recommend that our customers only exchange because of the safety/liability issues associated with someone else filling our tanks. However, you, as a consumer, are free to fill your cylinder if you wish. Not all of our tanks offer the special safety feature. The way to identify the special TS2 valve tanks that cannot be filled is easy. If your tank valve has a small triangular indention on the side, then it is "tamper" protected. If you prefer to have a tank that can be filled by anyone, take that tank back to any Blue Rhino retailer and exchange it for one that does not have the triangular indention.
For liability reasons, if you choose to refill your tank, please remember to remove the plastic sleeve before having it refilled.
I hope this information helps."