I could smell the gas when I openned the valve on both tanks on the outside of the trailer. I shut them both off and then just openned the valve on one of them and there was no smell. The tanks are connected by tubing to (I think) a regulator attached to the front of the trailer.
Hopefully someone else on the board knows more about propane
and propane accessories than I do. Where's Hank Hill when you need him ?
I almost wonder if the regulator might be leaking when it gets pressure from the 2 tanks, but not from just one. I would probably test this (outside) by opening both tanks, and leak checking all fittings, and the entire regulator. A light
mixture of Dawn dish soap and water on all joints and the regulator should show bubbles, or allow you to hear a gurgling sound from a large leak.