PureFlow AirDog A7SABF590 II-5G DF-165-5G Air/Fuel Separation System Lift Pump

The PureFlow AirDog II-5G A7SABF590 is a 165 GPH (Gallons Per Hour) diesel Air/Fuel Separation System and lift pump representing the newest generation in fuel delivery technology. Engineered for moderately to heavily modified diesel trucks, this system removes entrained air, vapor, and water from the fuel before it reaches the injection system, protecting your injectors and maximizing engine performance.

The AirDog II-5G uses a bed bracket mounting configuration, positioning the unit inside the bed forward of the rear wheel. The fuel module is modified to work with the venturi fill system, eliminating common quarter-tank fuel starvation issues. The pump draws fuel from the modified module and delivers it to the factory frame rail feed line, with the pressure line tapped via a return Y to supply the venturi basket with pressurized fuel.

Key Features:

• 165 GPH Gerotor Pump — Ample flow capacity for moderately to heavily modified diesel engines
• 4-Bearing Motor with Intermediate Shaft — Centers the gerotor pump and shaft seal, reducing noise and extending pump life
• Dual Feed Design — Supplies fuel to both sides of the gerotor pump, minimizing air bubbles and cavitation
• Diaphragm Fuel Pressure Regulator — Boost-referenced and adjustable from 7–70 PSI; preset at 50 PSI at idle, 70 PSI under load
• Demand Flow Design — Delivers only the amount of fuel required, improving efficiency and reducing heat
• Larger 3/4-16 O-Ring Boss Ports — Bigger inlet and outlet ports compared to previous-generation pumps
• Low-Flow Return (7/16-20 -4) — Prevents aeration in fuel being returned to the tank
• Compatible Filters — Uses proven FF100-2 fuel filter and WS100 water separator (same as AirDog II series)
• No Tuning Required — Retains factory variable fuel pressure; plug-and-play installation
• Limited Lifetime Warranty

The AirDog II-5G patented Air/Fuel Separation System maintains correct injection timing and eliminates spray-pattern disruption, allowing full power stroke and complete combustion. The result is improved throttle response, increased power output, and prolonged injector and engine life — a proven upgrade for high-demand diesel applications.