I used a FM100 fuel manager filter I took the cigar hose and mounted a tee in it,I then used a short hose sections and mounted a ball valve to the line to the return .Then mounted the feed line back into the filter to refilter the hot oil.If I needed to purge lines I open the ball valve to the return line I also ran a boost pump to bleed lines in a few seconds.Then when running a loop I closed the ball valve.I bought my ball valve at lowes and reduced to 7/16 hose.
Running in loop I could mantain 225 degrees as I used injection line heaters in addition to my FPHE.Returning fuel to tank can because of heat make more moisture in the oil.I heated the fuel not the tank

__________________
1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt