Propane prices this winter

[upthesaukee]

Originally Posted by Sue Doe-Nym

Amerigas showed up at 8:30, and 385 gallons later, such relief! I am no mathematician, but my figuring says we were at 8% before the fill up.....too dicey!

In your calculations, remember that tanks are only filled to 80% to allow for expansion and contraction due to temperature changes.

Dave

[DickR]

Originally Posted by upthesaukee

.... remember that tanks are only filled to 80% to allow for expansion and contraction due to temperature changes.

Dave

Further on that (on the Amerigas site, too) is this:https://www.amerigas.com/amerigas-bl...cent-fill-rule

What they could have added, but perhaps considered "too much information," is that there must be adequate vapor space above the liquid level for disengaging of liquid splatter from the top of the boiling surface when the heating system or generator is drawing fuel for use. Propane absorbs heat from the ambient air, through the tank wall, to vaporize liquid for flow through the piping. This boiling must occur, even when the outside temperature is 20 below, to provide at least a few psi of pressure to move propane vapor to the appliance. [OK, perhaps the above is TMI!].