What is an OPD Valve?

"OPD" is an acronym for "Overfill Protection Device"

• National Code now requires that all propane tanks of 40 lbs or less are fitted with an OPD

Why?

To ensure that a propane cylinder is not overfilled.

How does it work?

• OPD's are designed to be activated by a float valve and are required on all propane tanks of 40 lbs or less.

• It prevents overfilling by shutting off the tank valve when the proper propane level is reached. 

• A 20% empty space, in the upper portion of the tank is retained for fuel expansion.

• This OPD feature can also be inadvertently activated by tilting a full propane tank.