Davco Fuel Water Separator

[Chamberpains]

All the oil change shops I've gone to pretty much all do it like the directions. Including myself. Except filling the bowl to the top and cracking the top screw till the fuel level goes down to 1" above the bottom of the bowl. I fill it about half way and cycle the lift pump twice, then fire it off.. it finds its own level mark on the filter. Usually about an inch up the bowl... so ya, I was curious what exactly you guys are seeing done thats different.