Originally Posted by VicS1950
... the trailer gas piping layout ...
On the 19RD, the manifold is located in the REAR left corner. The tanks on the tongue. All of the appliances tie back to the 1 manifold.
I light the stove with a BBQ lighter so I can monitor the purging of the tank-to-manifold link. The lighter often gets blown out by the non-flammable gas in the lines.
Then the water heater, furnace and fridge.
The fridge is the most finicky. The manual even suggests 3 tries of 30 seconds each to purge the line.