LP System Session 5: Overfill Prevention Device (OPD)

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Duration: 2:04

The Overfill Prevention Device or OPD is a valve inside the container that restricts the filling of the tank to approximately 80% to allow for expansion of the LP. As of January 1, 2003 all containers of LP are required to have an OPD valve. A distinctive triangle handle on DOT cylinders indicate the proper valve.