The Pre-Combustion Solution for Maximum Engine Efficiency! The AirDog® FPII 4G Fuel Air Separation System is the state-of-the-art fuel processor that removes not only water and particulate contaminates from the fuel flow to the engine, but most importantly, the entrained air and vapor. Additionally, the AirDog® maintains the necessary net positive pressure to the engine fuel pump to prevent cavitation and the formation of vapor. The dual-port design feeds the gerotor from both sides, which hydraulically balances the outer gear. These special features provide the quietest and most durable fuel pumps on the market. The dash-mounted indicator light lets you know when to change the filter without waste of filter life or fuel economy. No more guessing! The stainless steel adjustable pressure regulator is part of the demand flow system that recycles the fuel not needed by the engine back to the water separator and through the filter for continuous multi-pass filtration. The patented AirDog® is the only fuel air separation system with third-party verified positive air separation. Our patented air bleed port vents the separated air and vapor from the fuel with a barely measurable pressure drop or loss of flow. The AirDog® air and vapor return line connects to the engine return line with engine-specific fittings, making installation quick, easy, and cost-effective.

AirDog® products are designed specifically for the most popular commercial and industrial diesel engines. See the list below for the engine-specific system for your application. Don’t see exactly what you’re looking for? PureFlow™ also offers Universal Kits, in various pump pressures and flows, adaptable to almost any commercially available diesel engines in service for trucking, industrial, off-highway (agriculture, excavation, mining, construction), RV, marine, and more. If you have any questions about the AirDog® or placing an order, please contact us at 1-877-463-4373 or sales@airdogdiesel.com.

*For AirDog® products for up to 1-ton pickup trucks, click here for the Light Duty Systems site.

The AirDog® FPII 4G Fuel Air Separation System can be installed on many engines types, such as:

CAT 3406 (A, B, & C)
Cummins N14
Detroit Series 60 (14L, 2003-2009)
Detroit Series 60 (12.7L, 1987-2002)
Volvo VED-12
Volvo D11
Volvo D12
Volvo D13
Volvo D16
Mack MP7
Mack MP8
Paccar MX-13
CAT 3406E
CAT C10
CAT C11
CAT C12
CAT C13
CAT C15
CAT C16
CAT C18
Cummins ISX
Cummins Signature 600