NAPA's SFI 23002 fuel filter works perfect as a fine water filter. 3/8" fittings and all-plastic. Mine has been installed for 2 years with zero problems.
Thats likely because your pump is in a very exposed location where rainwater and road salt can run down into the motor.The pumps dont last long. Seems like they inevitably leak inside and lock up the internals.
I bet companies like snow deal with warranty issues left and right with these pumps. =(