meirman wrote:
A friend of mine got a Sears furnace, a small one that fits between
two studs, to heat his garage. It runs on propane.

So he wouldn't have to keep changing tanks, another friend gave him a
propane tank that is twice or more the size of the tanks that go
under
propane grills. This is the size that is used to fuel fork lifts.

But now he is told that that tank is for *liquid* propane, and he
can't use it for his furnace.

I thought that unless the pressure is higher in the big tank than the
little, either both tanks hold mostly liquid, or both hold only gas.

And regardless, that what comes out when you open the valve is gas.

Why shouldn't he be able to use the bigger tank for his furnace?

Sounds like what he's got is an LP tank that supplies liquid.. meaning
it's got a pickup tube mounted in it so that liquid will come out of
the valve when opened. What it sounds like he needs is a tank that will
supply gas.

Regards,

Jim