Hot rod, thanks for the info on the valve. This is the first one I have seen with the pressure relife valve in the bottom. My tank was built by manchester and it was built as a motor home tank for Country Coach in Oregon. I looked on their web site and they had a drawing showing the valve on the bottom with an internal tube going to the top into the vapor space as you said. I might make some type of guard to protect from rocks and I will mount it without welding and make sure it can't prevent the flow. My tank will not be in a compartment so it should work as is. My plan is to fill it through a door above the trailer hitch. I built the last cross member with a cutout so the LPG person can reach the valve. When I built the hitch I considered your idea you gave to Ran D about the safety chain loops. I installed a chain that goes from the safety loop to the frame of the truck. If the trailer hitch failed the chains will have a chance of saving the hole mess.
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