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Description
Airdog II-5G 100 GPH Air Fuel Separation Lift Pump 98.5-04.5 Dodge 5.9L Cummins W/Block Mounted PumpThe 98. 5 2002 Cummins got a pretty bad rap over the years for failed VP44 injection pumps, many claiming it was one of the worst decisions ever made to mate this supposed failure prone pump on a Cummins powered Ram. Now, was it really the VP44's fault, or was the engine bay mounted lift pump really the culprit? In most cases, the failure of the low output lift pump causes the demise of the injection pump. And to make matters worse, they continued to
The 98.5-2002 Cummins got a pretty bad rap over the years for failed VP44 injection pumps, many claiming it was one of the worst decisions ever made to mate this supposed failure prone pump on a Cummins powered Ram. Now, was it really the VP44's fault, or was the engine bay mounted lift pump really the culprit? In most cases, the failure of the low output lift pump causes the demise of the injection pump. And to make matters worse, they continued to use a similar lift pump placement all the way through the 2004.5 model years before going to a higher output in-tank lift pump. So how do you really fix one of these trucks for good? Easy, ditch the block mounted/fuel filter mounted stock lift pump and upgrade to an AirDog!
The AirDog II-5G is an all in one premium fuel pump and filtration system for your 1998.5-2004.5 Cummins diesel. This system removes water, particulates, and entrained air from the diesel fuel. The entrained air that is separated from the fuel is returned to the tank through a small return fitting. The fuel is delivered to the engine at the correct pressure and flow rate to meet the demands of the engine under all operating conditions.
The AirDogII-5G DF-100 systems feature a built in adjustable diaphragm pressure regulator. All AirDog II-5G systems include a complete installation kit. The AirDog II-5G, for this particular application, is preset at 17 psi from the factory for a stock application. The regulator is adjustable up to 55 PSI so you can fine tune the system to perfectly match up to your current and future performance upgrades.
HOW IT WORKS:
The AirDog II-5G DF-100 draws fuel from the fuel tank through a 1/2” suction line to reduce the risk of cavitation at the pump. The fuel is then drawn through the water separator where 92% of water is removed per SAE spec 1488. It is then pressurized through a Gearotor pump and sent to the 2 micron fuel filter before it is sent to the injection pump. The air from aerated fuel, due to tank sloshing and engine return lines, is separated and sent back to the tank through the 3/8” return fitting. The excess fuel that the engine does not use is recirculated through the diaphragm regulator back to the suction side of the pump.IMPORTANT INFORMATION REGARDING BLOCK MOUNTED FUEL PUMP:
This specific AirDog unit is designed for trucks featuring the original
style block mounted lift pump. For those unaware, all of the
1998.5-2004.5 Cummins powered Rams came from the factory with a block
mounted lift pump. However, if it ever failed and had it replaced
previously, it very likely was retrofitted to the newer design that
actually placed the pump in the fuel tank. If you're not sure where
your pump is located, simply "bump" the key, which will engage the pump,
then listen whether the hum from the pump is coming from the engine
compartment or the fuel tank.
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4.8 ★★★★★
Based on 19 reviews
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Product Reviews
★★★★★ 5
Worth every penny!!
Color: Black
This kitchen sink caddy was exactly what I wanted. It's well made and small enough to fit on my new sink. It holds soap, dish rag or small sponge, drain stopper, and my two scrub brushes. Looks good, too
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Reviewed in the United States on March 19, 2026
★★★★★ 5
Great addition to my minimalist kitchen!
Color: Black
This kitchen sink sponge holder is simple yet highly effective. It keeps the sponge neatly in place, allows it to dry quickly, and makes the sink area look tidy. The sturdy material and easy-clean design make it a great little addition to any kitchen.
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Reviewed in the United States on May 7, 2026
★★★★★ 5
Strong sturdy reliable and versatile
Color: Black
This is a great little side piece to use for your kitchen sink or bathroom mine is in my kitchen sink it works great it sits on the side it's the perfect length holds my scrubber soap and other stuff I need instead of using a makeshift bowl. It's sturdy rust-resistant and I put it through the tests it gets wet every time I do which is every day in this house. You can use it for just about anything. There are no suction cups on it but there is a gray under it that catches all the loose water which is also very convenient. It looks modern and compliments most sinks and kitchens well
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Reviewed in the United States on September 27, 2025
★★★★★ 4
Good Quality but Limited Space for Multiple Bottles
Color: Black
This organizer is decent quality, but it ended up being smaller than I expected. For reference, I usually keep the following items at my sink:
• Dawn squeeze dish soap
• Mrs. Meyers hand soap
• Dr. Brown’s bottle soap
• A sponge
• A bottle brush
All of these items fit comfortably in my previous sink caddy that I bought on Amazon. Unfortunately that one eventually started peeling and rusting, which is why I replaced it.
With this one, the narrow section on the left side limits how much you can actually store. It works well for the brush, but it reduces the usable space for bottles. Because of that, fitting multiple soap bottles plus a sponge is a little tight. I also think my previous organizer was slightly wider, which made a bigger difference than I realized.
One feature I do like is the removable plastic tray on the bottom. It catches water well and keeps the counter from getting messy, which is a nice touch.
Overall, it’s usable and I will keep it, but if you normally keep several bottles and tools at your sink like I do, I would recommend paying close attention to the measurements before ordering.
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Reviewed in the United States on March 10, 2026
★★★★★ 5
Fits well in any space
Color: Black
This is a great little caddy. It sits nicely in the small area I have and keeps all my stuff organized. The tray comes out to clean it.
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Reviewed in the United States on May 3, 2026