Update (from the initial review comments, below):
Change the 'rating' from ONE star to FOUR stars.
THANK YOU to Customer Service rep, Carlos F.
The replacement filter unit works vastly better without the hole in the casting that was present in the first unit. It's mounted on a XtremepowerUS 30 Gallon Square Gas Caddy Tank Storage Drum Barrel Gasoline Fluid Diesel Carrier Pump, using a bracket that I welded up from some angle-iron, with a couple of pipe nipples that allow the assembly to slip onto the fuel caddy's handle. The diesel fuel in the tractor had accumulated some sediment over years of filling, etc. and it's very functional and reassuring to be able to pump the fuel OUT of the tractor's tank ---passing through one of the filters--- into the caddy, and then pump it back into the tractor ---passing through the other filter---. This filter is a valuable addition to any fuel caddy (acknowledging that a custom bracket might be needed) providing the reassurance that either recovered or dispensed fuel is well-filtered.
"Two-way automatic operation"... ????
See the uploaded photo for the location of the hole in the defective casting.
It spews fuel OUT of the VENT HOLE in the casting when you're pumping fuel into your vehicle, etc..
It sucks air IN through the VENT HOLE ---preventing pump's priming--- when you're trying to pump fuel from the vehicle.
So, in a sense, it is "Two-way" but it's very awkward and you have to love the smell of diesel all over you unless you hold your finger over the vent hole while you're pumping with the other hand. it will probably require being drilled out to a 1/8" hole, followed by placing a sealed-end "Pop Rivet" in the hole so that fuel doesn't spew.