Originally Posted by OldCoot
That's the best way of doing it, that way you always have a full tank and don't run out in the middle of the night or on a weekend when you can't get them filled. Been doing it that way since our first trailer in 1975.
I still don't understand how this prevents you from running out in the middle of the night. In moderate cool weather (50 degree days, 40 degree nights), we'll go through a tank every other day or so. It varies somewhat, of course.
But anyway, if you're using a tank with only one open, how do you know when it'll run out? For instance, my in-laws were in our camper for a week and I only had 1 tank open- it ran out sometime after midnight and 8am. At 8am she sent him out to open the other tank up.
Sure they weren't out of propane entirely and had a full tank to switch to, but the one still ran out overnight.
Now, had they both been opened- it would have switched and regular glancing at the changeover would have alerted us without waking up cold one morning. (Assuming we remembered to check, of course.)
The remembering to check is where I think your way is better. If you're consistent, you will find one is out and fill the other leisurely. If you're not consistent, you run out of both and are more screwed if you run out.