I may be missing the question, but the fill port is big thread on connector for liquid propane being pumped into the tank. I think it would be very hard to connect a small gas carrying line to it, or very expensive.
AFAIK, you just need to tap into the gas (vapor) line after the on/off valve or your tank and before the regulator.
If you don't know how to plumb propane safely just take the van to a propane seller who does installs and repairs also and tell them what you want. IMO, you probably shouldn't do this one as a DIY.
|