I finished the project. All installed, no leaks, and it works well.
We measured the propane pressure of the fire pit's regulator. It is 13" of WC.
Our camper's regulator measured at 10" of WC.
But, I bought a new hose for the pit (no regulator) and it works fine running off of the camper's regulator.
Nice having an auxiliary propane hookup on this old camper!
"rolls down one hill, can 'ardly make it up the next..."
1999 21' Wildwood WDF21RK
2006 Dodge Ram 2500, 4x4, Quad cab, 5.9L Cummins, 3.73 gears.