On Mon, 04 Jan 2010 22:05:29 -0600, "Martin H. Eastburn"
wrote:

Go to a travel trailer place. They will sell you a manifold that
switches on-line a full before the depleted one goes. Shows you what
is going on.

It allows you to replace an empty bottle on-the-fly.
Not really needed...

Martin

William Wixon wrote:
is this possible? plumbing together two 20 lb. propane tanks? i've got a
propane heater in my workshop, it draws too much propane for one 20 lb.
tank, freezes the propane. i was wondering if i plumbed two together if i'd
be able to get enough gas to run the heater. is this stupid? do people do
this? was wondering if they were plumbed together should it be before or
after the regulator(s)? wondering if that's even possible, to have two
separate regulators on two separate tanks running one heater. i don't want
to get a larger tank, i've collected about 6 - 20 lb. tanks, i don't want to
have to buy or rent a larger tank. (100 lb.?) i usually use propane for
quick heat, warm up the shop until i get the wood stove fired up and making
heat, then i turn off the propane heater so i'm not running propane
continuously, maybe 1/2 hour.

b.w.


and SOME even have a "both" setting.
Some of the automatic ones could possibly switch back and forth when
the pressure drops, even though the tank is still far from "empty"