Keep your AirDog systems performing at their optimum level with fuel filters from Pureflow. These replacements fit your AirDog, AirDog II & AirDog II-4G filtration systems. A plugged fuel filter can cause low fuel pressure and flow to your diesel engine. Put the bite back in your AirDog with Pureflow fuel filter replacements. Keep your AirDogs in attack mode with replacement water separators from Pureflow. These water separators fit your AirDog, AirDog II & AirDog II-4G filtration systems, keeping them ready to guard against unknown quantities of moisture in your diesel fuel. Make sure that your AirDogs are ready to take a bite out of contaminants with replacement water separators.