Never heard about 2 LP tanks needed to be connected to have anything run in the trailer...our fridge was constantly on LP gas for 9 days with no problem...now with the 2 LP tanks there is a regulator between the two and you turn the "dial" to the one you are drawing fun and make a point of keeping both tanks open when using the fiver so if the LP runs out of one tank it will automatically start drawing from the other tank; at that point switch the dial and get the empty tank filled ASAP so you won't forget
