Originally Posted by OldCoot
a 20# cyl will run the frig for at least 6 months or longer.
That's hard for me to believe but if you've done it.... ok.
My guess is a single 20# LP tank will run your fridge a month.
That is if you don't use LP gas for anything else.
No cooking, no hot water, no heat.
You should be able to go a week easy on one tank and have hot
water and cook breakfast too!
Assuming you have an automatic switchover regulator you can turn
on both tanks.
The regulator will have a little lever that you can turn from one side
to the other.
The tank the little lever is pointing towards is your "main" tank.
The tank the lever is NOT pointed to is your "reserve" tank.
If you turn on both tank valves, when the "main tank" has LP the little
window in the regulator will show green inside.
When the "main tank" runs out, the regulator will switch to the "reserve"
tank and the little window will show red inside telling you the tank
that the lever is pointed to is now empty (or shut off).