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Internet #100497925

Model #D55146

Store SKU #457397

4.5 Gal. Portable Electric Air Compressor

  • Supports multiple framing, roofing or finish nailers concurrently
  • 200 PSI max, low-maintenance, oil-free motor
  • Large wheels and retractable handle for easy job site portability
  • See More Details

Product Overview

The DEWALT 4.5 Gal. Portable Electric Air Compressor has pneumatic wheels for easy transport around a job site. The compressor can be used to support roofing and framing nailers (not included). When storing, the air compressor can be moved to a vertical orientation to save space. Its steel construction adds increased durability. With a low operational noise level, the air compressor delivers a quiet work environment.
  • 1.6 HP electric engine gets the job done
  • High-pressure motor with consistent draw requirements can be run with a 12-Gauge or higher extension cord that is under 50 ft.
  • 200 PSI maximum pressure
  • Delivers 5 SCFM at 90 PSI so it recovers quickly after an initial tank charge
  • Low-maintenance, oil-free pump for convenience
  • 78 dBA operational noise level for a quiet and safe work environment
  • Automatic start/stop operation for safe and easy use
  • Steel tank is durable
  • Pneumatic wheels provide easy transport around a job site
  • Vertical stand saves storage space
  • ETL listed
  • Need help? CLICK HERE to view our Air Compressor Buying Guide
  • Click here for more information on Electronic Recycling Programs
  • California residents

Info & Guides

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Product Depth (in.)
33.75 in
Product Height (in.)
17 in
Product Width (in.)
24.5 in


Air Delivery SCFM @ 40PSI
Air Delivery SCFM @ 90PSI
Amperage (amps)
Application Use
Air Brushing,Blow Cleaning,Bolting/Wrenching,Brad Nailing/Stapling,Drilling,Finish Nailing,Framing Nailing,Hobby Painting,Inflation,Spraying
Battery Amp Hours
No Battery
Tool Only
Charger Included
Charger Not Included
Compressor Tank Capacity (Gal.)
4.5 Gal.
Compressor Tank Capacity (Gallons)
Compressor Type
Framing & Roofing
Compressor Volume Rating
Compressor/Air Tool Features
Handle,Oil Free Compressor,Tank Pressure Gauge
Decibel Rating (Outdoor)
78 dBA
Horsepower (hp)
1.6 hp
No additional components or accessories are included
Included in Combo
Compressor Only
Lubrication Type
Oil Free
Maximum Pressure (psi)
Number of Total Batteries Included
Power Source
Power Type
Corded Electric
Product Weight (lb.)
83 lb
Stage Count
Single Stage
Tank Material
Tank Style
Tools Product Type
Air Compressor
Voltage (v)
Voltage (volts)

Warranty / Certifications

Certifications and Listings
ETL Listed
Manufacturer Warranty
30 Day Money Back Guarantee, 1 Year Free Service Contract, 1 Year Warranty

Questions & Answers


Will this operate a 20 ton bottle jack ?

Asked by Joe February 18, 2019

Please contact the Jack manufacture for specifications on what will work with their product.

Why won't my compressor build up air pressure passed 60psi

Asked by Deal August 21, 2017

I would check two things. First, there is a pressure relief valve on the bottom side of the tank. Make sure this is closed. Second, check the "Regulated Pressure" knob to make sure it isn't set too low. The regulated pressure is the pressure you want to deliver to your attachments. The tank pressure on mine typically builds up to 180 psi. If both of those things seem right, you might need to call the company.

Can use a 3000 watt digital inverter hooked up to my car to run this air compressor?

Asked by James August 5, 2017

Electrical systems on vehicles vary; please check with your vehicle's manufacturer prior to using any accessory/tool.

How fast is the recovery time for the tank to refill?

Asked by sparky June 29, 2017

It takes just a minute or two for the tank to recharge, when completely empty.

Can i use this compressor for dental supplies?

Asked by Rameen June 28, 2017

Compressed air quality depends on the inlet air and what the compressor adds to it. Both oil-less and lubricated compressors are used in dentistry. Both require particulate filters to remove any airborne dirt and dust. With a lubricated compressor, the system must also include reliable coalescing filters to ensure patient safety. Most dental compressors include a dryer to remove moisture. The common types are desiccant and membrane. Both types use air to purge the saturated desiccant material or membranes. This reduces the air available chair-side. When selecting, consider how much dried, compressed air is needed for the purge. Keep in mind this DeWalt 4.5 Gal. Portable Electric Air Compressor is not rated for commercial use, though, it is often hard to quantify up front, your experience has probably shown that good quality equipment pays for itself. In the long run, quality compressors last longer, with less frequent repair and lower service costs. Can you afford the downtime?

What is the cfm@ 20psi

Asked by PainterMike April 30, 2017

The D55146 will have approximately 7.8 SCFM @ 20 PSI.

How much oil does the compressor need

Asked by ZZ February 25, 2017



Asked by Rich February 15, 2017

Yes it is awesome choice

Hi, Should I still use an inline filter for the hose even though there is already a filter for ai...

Asked by SuperDave February 14, 2017

Since it's only a 4.5 gallon tank, you can just drain the tank after each use, unless you plan on painting or sandblasting, then I would strongly suggest using a filter. If it makes you feel better, go ahead and add a filter, they are not really expensive.

How many watts does this compressor use

Asked by MAC February 9, 2017

This compressor uses 1800 Watts.

4.5 Gal. Portable Electric Air Compressor - page 2

Customer Reviews

  • 4.3
    out of 110 reviews
  • 83% recommend this product
Filter by:
Showing 1-10 of 110 reviews
Beyond expectations
[This review was collected as part of a promotion.] I bought this a few months ago and the wife and I decided to build our own cabinets. I have 2 Dewalt drills in addition to the Dewalt air compressor. The air compressor has changed my life. I absolutely am a Dewalt guy and now, I’m in love with air tools now thanks to this compressor. This is the first time I’ve ever owned an air compressor and I’m so glad that I took the plunge. Being a Dewalt guy, there was no choice but Dewalt air and it has definitely not disappointed me.
by Jhoward
Not impressed
Bought this a few weeks ago went to use it and it no longer holds pressure only used it twice
by First responserestoration
Great Machine
Even with me being partial to Dewalt Tools, this compressor is the one to have. Especially for guys who shoot texture.
Can't use in upright position
I only gave it one star because when I look at reviews, I always look at the most critical first. I figure other people might do the same. I actually never even turned the thing on to see how it ran. As you can see by the attached pictures, I intended to run it in the upright position due to how my garage is built and where I already had my hose reel. I didn't see the warning label on the display model or I wouldn't have bought it in the first place. I think the reasoning is because in the upright position, the tank fill fittings are closest to the bottom and thus would allow moisture accumulation to go back down into the compressor and gauges. Another thing, the display model boasted the flat free solid rubber tires which I was excited about since I have one on my wheelbarrow. When I got mine home and unboxed, it had tube tires on it. I'm returning mine.
by Jeremy
10 people found this helpful
Contractor Tested
We have run this little girl everyday for several hours at a time.It sits out In the weather on back of the work truck.I have pushed,pulled and dragged this machine through all kinds of terrain.Very satisfied and will buy the Identical if we ever ruin this one
17 people found this helpful
Did not last long
I got about 10 uses out it , I think something went wrong with switch , it will turn on some times , I can not count on it have it sitting in my garage . I have power tools they work great disappointed in air compressor
by Veteran
Regulators/valve systems are junk. Everything leaks. Multiple warranties and multiple compressors and they each have same problems. Buy a different brand. And I'm a Dewalt guy. I have thousands upon thousands of dollars in Dewalt power tools.
by TopNotchConst
runs pretty good
will run several nailers at one , and can keep up with a shingle hogs air consumption . compressor build alot of moisture in the system, not sure if its due to the air pickup being on the bottom of unit, seems to cycle great, cold weather dosent seem to bother it, other than the moisture in the system.
by Dewalt Mikey
Wont last
I own a construction company and bought two of these just less than a year ago. One lasted about 6 months and the other just quit building air today. When they were new they worked great. But quickly wore out.
by CodyMPB
[This review was collected as part of a promotion.] The best compressor I've owned. Does not leak air. Quite running.
Showing 1-10 of 110 reviews