AirDog II A5SABD026 DF-165 Air/Fuel Separation System

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2005-2015 Dodge 5.9L/6.7L Cummins (Moderate To Extreme)
AirDog by PureFlow
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The PureFlow AirDog II A5SABD026 DF-165 Air/Fuel Separation System for your 2005-2015 Dodge 5.9L Cummins provides the most effective technology designed specifically to remove water, particulates, vapor and entrained air from the diesel fuel in your truck. The AirDog II is a lift pump and filtration system that enhances the fuel delivery to your engine with a commercial duty system. The AirDog II features the one-of-a-kind Demand Flow Technology which improves on the original AirDog design, by only drawing the required fuel needed by your engine.

Your high performance diesel engine demands higher fuel flows. Yet higher fuel flows increase the vacuum at the fuel pump and agitation in the fuel tank. These factors generate additional air/vapor in the fuel system preventing your engine from producing maximum power and efficiency. Additionally, air/vapor can cause galling and pitting of the injector barrel/plunger assembly and also tip erosion. The AirDog II eliminates air in the fuel that robs your engine of consistently greater performance and can also cause permanent damage to your injectors. The AirDog II also provides the fuel pressures and flows your diesel engine needs to produce maximum power, any time, every time!

The Airdog II features the one-of-a-kind Demand Flow Technology. The AirDog System functions by taking fuel from the tank, and passing it through the water separator which removes large particulate contaminates. Then, fuel under positive pressure flow enters the fuel filter. As the fuel passes through the fuel filter, the remaining particulate contaminates are caught and contained, the entrained air/vapor is also separated. Through the positive fuel air separation features of the patented AirDog® II the separated air/vapor is discharged from the filter and back to the fuel tank through the Primary Air/Vapor Discharge Port.

The fuel passing through the filter is now free of contaminants and power robbing air/vapor. At pressures and flows able to meet the needs of the engine, it exits the fuel filter through two passageways. First, the fuel for the engine, passes into the fuel pickup tube and on to the engine. Then, the excess fuel not needed by the engine recycles internally through the pressure regulator back to the water separator. Each kit includes plumbing, hardware, wiring harness, mounting bracket and all components needed for installation.


  • 165 GPH @ 15-17 PSI (Stock-800HP)
  • Removes Air & Water From Fuel 
  • Increased Horsepower & Torque 
  • Optimized Engine Performance 
  • Improved Throttle Response 
  • Increased Fuel Economy 
  • Lifetime Limited Express Warranty
  • Pre-Set Adjustable Regulator

Customer Reviews - Include your order number for a chance to win a $100 GiftCard

(116 Ratings, 8 Reviews) Average Rating:
Very well Satisfied with product!
Donald Brady (Johnson City, TN) 3/13/2015 4:14 PM
I purchased my Air Dog II in the spring of 2009. It ran 6+ years flawlessly until the motor grounded causing the fuse to blow. Contacted Pure Flow Technologies and the have shipped me a replacement motor and pump. I can't complain about this product because it has never given me a problem. Definitely would purchase another one.
Airdog sucks
Brandon (West Virginia) 1/3/2015 1:14 AM
I bought the airdog 2 under the impression that it would be a safe and reliable way to help extend my injectors and cp3 life span. Well, My first pump only lasted 8 mouths before it needed to be replaced. Seals failed in the pump and let diesel in the pump motor , Causing the pump to draw high amps and melt the fuse. This happen 3 hours away from home. Had to put a bigger fuse in and limp the truck home. This happen right after spending 2,900$ for new injectors. Faster forward today. replacement pump is doing the same thing only after a little over 2 years and being told by airdog it wouldn't happen again cause they fix the problem. I'm now four hours away from home and the pump pretty much quit on me. Only way it will run is if I tap it lightly with a hammer. Whats worst I was helping my brother in law and sister move in to there new house when this happen. I really needed the truck, so Called airdog , Never could get a hold of anyone. While I was on hold airdog closed and hung up on me. So the next day, I call 5 different times, never could get a hold of anyone. After leaving 2 messages somone called me back in 2 hours, Told him what was going on and needed the pump asap. He told me, it would get there in two days. And he tells me they had fix the proplems with the pumps and it wont happen again. I told him I was told that last time, and it failed. So 2 days pass, I call airdog to make sure this pump was going to get delivered on time. I was told it would be 3 more days. Cause of newyears and the week end. I told them I was told it get here in two days. The lady siad it ship ups ground and If I wanted faster shipping I should have asked. I told her In my massage I Siad I needed it asap and would pay for faster shipping if need be, Her answer was , well there's nothing I can go about it now. I about flip out. So now Im stuck 4 hours away from home, waiting on a piece of junk that I have no doubt will fail on me again. don't wast your time and money on airdog.
Nate (south Florida) 1/22/2014 2:49 PM
The first pump went out in 3 months and the second one is sounding funny. They were good about the replacement but for the money it cost it should be reliable. The mounting location is way to low and I constantly worry about ripping it off. I wouldn't recommend it especially if you have a vp truck because the loss of fuel pressure when the unit fails could take your injection pump with it.
injector insurance policy
ram3500 (tx) 9/14/2013 9:48 AM
great product! tower motor had to be replaced after 9 months.. called airdog informed them of the problem and within 5 days they had shipped the replacement motor... this is an excellent product and would highly recommend to any diesel owner!!!
So upsetting.
Steve (New Jersey) 10/6/2012 10:15 PM
I installed this unit in my ppump'd 12valve with the intentions of making my truck run smoother and possibly bump up fuel pressure to help feed my bigger injectors and turbo modifications. If I got anything out of this 700 dollar deal, it's a headache. I have a few calls into pureflow in hopes of getting an answer and nothing. My truck is my pride and joy, and this unit makes me hesitate to drive anymore. What a disappointment.