Losing Fuel

I used to run a Carter rotary vane electric and it was ok, but it died way too early in my opinion. (less than a year)
Now I run a 7-10lb. Holley at 38gph and it has been fine for a year so far.
One hell of a lot quieter too.
I use a restrictor in my return line to keep the feed pressure at around 6-7lbs.
And you do this inline with an engine driven mechanical pump?