So, I'm not much of a plumber and looking at the Sure Marine tank contraption, the full set-up has the Railmount Assembly (Tank not Included) for 6# Aluminum Propane Tank. Comes with Regulator, Gauge, Solenoid, Solenoid Control, POL Fittings and High Pressure Hose (from POL to Regulator). What is the POL? and for my purposes, this will only be hooked up to a grill, do I need the solenoid assembly?
I have the capability to build one of these rail mounts but I'm a bit unsure of what I'd need for plumbing between the tank and grill.