What is an OPD?
Every year thousands of propane tanks are overfilled at refill centers. Since overfilled tanks can be dangerous, the National Fire Protection Association (NFPA) has enacted code 58-2.3.1.5. In summary, it states:
- All new tanks are to be manufactured with overfill protection devices (OPDs).
- Tanks without OPDs can no longer be refilled by anyone.
- Empty tanks with round or star shaped valve hand wheels do not contain OPDs and are obsolete.
- OPD tanks can be identified by the unique triangular shape of the valve's handwheel.
- They also have the letters "OPD" on the hand wheel and the side of the valve.
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