What does the term "water capacity" refer to in propane containers?

The term "water capacity" in the context of propane containers specifically refers to the amount of water required to fill the container at 60 degrees Fahrenheit. This measurement is crucial for establishing a standard for the volume of the container, which is then used to calculate the amount of propane it can safely hold.

Essentially, water capacity provides a reference point because propane is often measured in terms of its liquid volume, and the density of propane differs from that of water. Knowing the water capacity allows for accurate conversions between the amount of water and the equivalent volume of propane the container can safely hold, ensuring safety and compliance with regulations.

This distinction makes it clear that water capacity does not refer to the weight of the container, the amount of propane it actually holds, or the volume of gas inside it. Each of those aspects relates to different measurements and standards that do not define water capacity.