Review on Ideal Fuel Water Separator Marine 120AT NPT ZG1/4-19 Automotive Parts with Fitting - Complete Combo Filter Diesel Engine (Includes 2 Fittings, 2 Plugs) by Mark Loebis

Not a bad little filter. 10 microns. I found a small problem, not knowing if it was just my installation or not, I was able to fix it. Fuel flows down the center tube as the tank fills it and then passes through the pleated filter element, presumably squeezing out the water. I did not witness the collection of water. not yet confirmed. My problem was that if you blow in the direction ports like this, the input pass goes to the filtered pass. So in theory, with my standard bleed screw, unfiltered fuel could go straight from the bleed port to the filter port. I was able to fix this by removing the stock air vent or vent screw and replacing it with a longer vent screw. If someone wants to check their flow, you can blow into the channels and try to plug the center inlet from the bottom. You will find that the air then enters the filtered duct, bypassing the filter with standard screws. Unless mine accidentally came with a shorter screw. subject to clarification.