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USD 620
Part #: PTA4SPBD002

AirDog A4SPBD002 100GPH Air/Fuel Separation System

2005-2018 Dodge 5.9L/6.7L Cummins (Stock to Moderate)
Part #: PTA4SPBD002
★★★★★ ★★★★★ 10 Reviews
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The PureFlow AirDog A4SPBD002 100GPH Air/Fuel Separation System for your 2005-2018 Dodge 5.9L/6.7L Cummins provides the most effective technology designed specifically for diesel pickups to remove water, particulates, vapor and entrained air from diesel fuel. The AirDog is lift pump and filter system, that enhances the fuel delivery to your engine with a commercial duty system.

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 form 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 eliminates air in the fuel that robs your engine of consistently greater performance and can also cause permanent damage to your injectors. The AirDog also provides the fuel pressures and flows your diesel engine needs to produce maximum power, any time, every time!

The Airdog works by pulling fuel from the fuel tank containing entrained air/vapor, particulate contaminates and unknown quantities of moisture. The fuel passes through the water separator which removes the water and large particulate contaminates. Then, the fuel with only entrained air/vapor and tiny particulate contaminates remaining, enters the fuel pump. Under positive pressure flow, the fuel passes through the fuel filter and the remaining particulate contaminates are caught and contained, the entrained air/vapor is also separated and returned to the tank. The clean fuel is now free of contaminants and water and flows at the proper pressures up to your engine. Each kit includes plumbing, hardware, wiring harness, mounting bracket and all components needed for installation.  

  • 100 GPH @ 15-17 PSI (Stock-500HP)
  • Removes Air & Water From Fuel 
  • Increased Horsepower & Torque 
  • Optimized Engine Performance 
  • Improved Throttle Response 
  • Increased Fuel Economy 
  • Lifetime Limited Express Warranty


  • MFG. Number A4SPBD002
  • Manufacturer Name AirDog by PureFlow
  • Shipping Weight 27.00 lb.
  • Shipping Length 19 in.
  • Shipping Width 13 in.
  • Shipping Height 7 in.
  • Fuel Type Diesel
  • EO Number D-595-3
  • UPC 813094015023
  • Warranty Yes
  • Warranty Info Limited Lifetime


★★★★★ ★★★★★
4.1/5 Stars out of 10 Reviews
(PA) | April 17th, 2011
i bought this pump for the increased MPG's and to save my pump that i just replaced. i always hear that the factory lift pump is crap, so i wanted more piece of mind. so far i have seen 0 increase in mileage. after 2 months the pump still works fine. my next hurdle is to install the fitch fuel catalyst because the air dogg came with new 1/2 fuel lines and the fitch thing has 3/8 lines with hydrolic threads wich is causeing a delemma to install. I was really hopeing for the increased fuel mileage but i still get 430 miles per 30 gals.
Drilling Consultant
(Mississippi) | September 21st, 2011
I have a 2000 1 ton w/ auto - strickly a farm / work truck. My concern was burning up an injector pump as Dodge still don't get it that their lift pump is crap. Also about the gain in fuel milage promised yet has to happen. I followed the instructions that came with pump as my truck had a in tank lift pump. My truck kept running out of fuel just below 1/2 tank and the two times it did it I was towing my backhoe. So in anticipation of needing it I dropped the tank and installed the Fass stainless steel draw tube, removed the lift pump and cut the suction and return lines (OEM). Now the truck runs fine, no milage increase though. I guess in a real world enviroment you should get better milage as your fuel should be free of air. Like I said I don't drive enough to see a change in the milage but I do have more power and peace of mind that my pump will not burn up. I also installed the pressure warning light as it's cheap insurance. The only problem I have now is the tank gasket that goes between the OEM lift pump housing is leaking and that's my fault.
Not Impressed
(Oxnard, CA) | July 17th, 2012
The pump works fine now that its in and I rewired the wiring harness and fabricated a draw straw for the fuel tank. The instruction showed that the suction tube would work fine with the factory draw straw but it didn't allow nearly enough fuel to the pump. Also, the wiring harness had connectors in the wrong places so I had to do a lot of cutting and splicing. After all this it seems to work alright.
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Questions and Answers

Does this replace the stock lift pump either engine compartment mounted or in-tank (2004 Dodge 5.9) I want a system to replace the stock lift pump and filter system
View Staff Answer 

Yes, your stock lift pump and fuel filter will be replaced regardless of you stock lift pump location.

Is this a good apliction to replace the factory lift pump? Where does this unit mount and is this a complete kit with fittings?
View Staff Answer 

The PureFlow AirDog 100 Air/Fuel Separation System is a great replacement of your factory lift pump. The pump is mounted to your frame rail with the supplied mounting hardware and ships complete with a full installation kit. For more information, give our Diesel Experts a call at 1-888-DIESEL4!

Can I remove my stock fuel filter or should I leave it in?
View Staff Answer 

You stock fuel filter can be left as a secondary filter or removed completely.

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