what is opd
What is an OPD? OPD is an abbreviation for Overfilling Prevention Device, which is part of new national fire and safety standards designed to make the use of propane even safer. An OPD is a safety feature that prevents small propane cylinders from being overfilled. After January 1, 2003, all propane cylinders 4 pounds to 40 pounds MUST be equipped with an OPD. This standard is required by the National Fire Protection Association and by Oklahoma state law.