down home wrote:
This is something we have seldom seen elsewhere. No one wanted to deliver unless it was 100 gallons or more. In winter, pulling up to fill with propane, when needed is not a favorite chore. Original tank haled 38 gallons, factory changed it out and new one holds only 80% of that to suit the EPA.
The 80% capacity is to allow for gas expansion.
https wrote:
Propane delivered to the tank at your home or business is stored in a liquid state under pressure. It expands in the presence of heat, creating pressure that can build in a propane tank when it’s hot. The additional space inside the tank is needed to allow for propane to expand into a vapor.