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California Air Tools

Model # 4620A

Internet # 202977405

4.6 Gal. 2 HP Ultra Quiet and Oil-Free Aluminum Twin Tank Air Compressor

This item has been discontinued.
The Home Depot no longer carries this specific product.

$299.00 /box




Model # 4620A

Internet # 202977405

The California Air Tools 4620A Ultra Quiet air compressor is designed to be one of the quietest 2 HP electric air compressors in the industry having only 70 decibels of sound. The powerful 2 HP motor operates at only 1680 RPM creating less noise and less wear. The oil-free Dual Piston Pump System is engineered for high performance and durability. The oil-free pump allows you to use in different temperatures and uneven terrains. The 4.6 Gal. aluminum rust resistant twin air tank will fill (from empty to full) in less than 60 seconds. The control panel comes complete with two 1/4 in. quick release connectors that will allow you to use up to 2 tools at the same time. This air compressor delivers 5.30 CFM at 90 psi allowing you to use larger air tools and more air tools at the same time. Powerful, Compact and Portable this air compressor is ideal where noise is a major issue.

  • Ultra-quiet only 70 decibels
  • Oil-free dual piston pump for less maintenance and longer life
  • 4.6 Gal. rust free aluminum twin tank
  • Lightweight for easy transporting - 64 lbs.
  • Powerful 2 HP (rated/running) motor
  • 7 CFM at 40 psi and 5.30 CFM at 90 psi/maximum pressure - 125 psi
  • 2-pressure control gauges and two 1/4 in. universal quick connectors
  • New (2014) easy start valve, allows for a no load start, for a low start up amp draw, only 14-Amp
  • Extra-large dual piston pump for increased compression and extra-long pump life of over 3000 hours
  • Less time to fill the tank - only 60 seconds from empty to full
  • From 90 psi to 120 psi (kick off) 20 seconds from 120 psi to 90 psi (kick on) 10 seconds
  • Low vibration - motor speed of 1680 RPM
  • Oil-free pump allows you to use in different temperatures and terrains
  • Thermal overload protector
  • Easy to use ball drain valve
  • Need help? CLICK HERE to view our Air Compressor Buying Guide
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Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Air Delivery SCFM @ 40PSI 
Air Delivery SCFM @ 90PSI 
Amperage (amps) 
Application Use 
Air Brushing,Blow Cleaning,Bolting/Wrenching,Brad Nailing/Stapling,Cutting,Drilling,Framing Nailing,Hobby Nailing,Hobby Painting,Inflation,Roof Nailing,Spraying,Surface Prep 
Compressor Tank Capacity (Gallons) 
Compressor Type 
Framing & Roofing 
Compressor/Air Tool Features 
Handle,Oil Free Compressor,Tank Pressure Gauge 
Decibel Rating (Outdoor) 
70 dBA 
Horsepower (hp) 
No additional components or accessories are included 
Lubrication Type 
Oil Free 
Maximum Pressure (psi) 
Power Source 
Product Weight (lb.) 
64 lb 
Pump Type 
Dual Piston 
Stage Count 
Single Stage 
Tank Material 
Tank Style 
Tools Product Type 
Air Compressor 
Voltage (volts) 
Warranty / Certifications
Certifications and Listings 
No Certifications or Listings 
Manufacturer Warranty 
Limited 1 Year 


Rated 4.4 out of 5 by 56 reviewers.
Rated 5.0 out of 5.0 by 4.6 Gal. 2 HP Ultra Quiet and Oil-Free 4620A IS it QUIET??? You bet !! What a difference from my last compressor in every way. Less vibration when running, more CFM at 90 PSI, Very fast recovery of air to full tanks, pressure settings were spot on. Quality of machine is pretty decent over all. One thing I would change to a better quality are the two air couplings, and put in the directions the style they are to purchase male parts for air hose to attach. Quality control is a problem.....Braided air hose was kinked at 90 degrees and blocked air input. I had to replace it before I could use it. No problem of fast response from California Air with a new hose. Tech support was excellent!! I also tighten 7 bolts that were loose.(always check machine before first usage) Over all I am very pleased with the performance of the machine and glad I bought it. November 9, 2015
Rated 3.0 out of 5.0 by Great mechanics, aesthetically challenged We are very pleased with the performance of this compressor. It is indeed very quiet and more than enough power to run the plasma cutter we use with it. We were disappointed at the quality control, however. The base of the compressor was chipped and poorly constructed, which makes us worry about the quality of the parts we can't see (photo attached). We aren't particularly concerned about a paint chip on the base but we are a little nervous how the rest of the compressor will last in the long term. I would suggest Home Depot work with the manufacturer on quality control since this damage did not happen in shipping. October 21, 2014
Rated 5.0 out of 5.0 by outstanding I had shipped to store and inspected at the store. The unit came in flawless condition. I knew it would be on the heavy side but I am going to fashion a cart for it with an old handtruck for moving around when i nail base and mouldings. I love the quietness of this unit. I can take in in peoples homes and not drive them crazy with the noise. November 3, 2015
Rated 5.0 out of 5.0 by Way better than what I had anticipated based on some other reviews Quality level was high. Very quiet and quick recovery. Not super light, but light none-the-less. So Far - So good! Added bonus is that it did not trip a 15 amp breaker! September 1, 2015
Rated 5.0 out of 5.0 by This product has great features. I needed a quieter compressor and this fits the bill. It is quiet enough that you can have a conversation right next to it while it is charging. It's great for blowing dust out of the garage and filling bicycle and other tires. Haven't tried it with a nail gun yet, but recharges in less than a minute. The aluminum tanks make me less worried about corrosion due to there always being water in the tank when I release the pressure at the end of the day. It have a very handy finger-switch for releasing the pressure. Much easier than the knurled fittings on most generators. I have it connected to a 50 retractable hose mounted to the ceiling. The compressor is small enough to fit under my workbench (picture). I couldn't be happier with this compressor. April 16, 2014
Rated 2.0 out of 5.0 by Good and Bad. This compressor is very quiet, and very fast to refill. But, There were two parts in the bottom of the box when I opened it that had fallen off. Over the next couple months of using it maybe an hour per week, a couple more parts loosened up. The major problem is that instead of turning on at about 85 PSI and then shutting off at 120 PSI, it just turns on and off randomly . Some times it will kick on at around 100 PSI and shut off at 105PSI . That's is only going to burn out the motor when it is kicking on and off every few seconds. Some days it will not even kick on, I have to turn it on and off every few minutes. My Co-workers have purchased much cheaper compressors that have lasted for years. I'm not happy with this purchase. It is possibly the worst tool that I have ever owned. October 15, 2015
Rated 5.0 out of 5.0 by Worth every penny! I did an immense amount of research before jumping into air compressor tools. I checked through all major retail outlets and also some online only ship-direct warehouses and this one by far is the best value per dollar out there. It's very quiet, oil-less (practically maintenance free), has two quick connects, and for it's size puts out a high amount of CFM. When you start to compare compressors you realize how important the CFM rating is and this one has one of the highest for the price range, HP, and tank size. Short of shelling out $1000 for a high volume, high HP compressor this is easily the best value out there if it is in your price range. Plenty of power for my (fairly beefy) IR impact wrench, air chisel, air ratchet, nail guns, airing up vehicle and bicycle tires, etc. April 4, 2013
Rated 5.0 out of 5.0 by Works as stated in the ad Had mine shipped to Home Depot to avoid a possibility of poor shipping. Came to me in perfect shape. No damage, but there was a loose pressure switch (sits behind the ON/OFF switch box). Using a dB (A and C) meter, sound was measured at 68dBC (dBC includes freq below 500Hz dBA is greater than 500Hz). Note: Every 10 dB is considered a perceived human hearing of doubling of loudness so the Husky 4 gal equiv. (1.5HP, 3.8 @40 2.8 @90) is more than twice as loud as this, for example. I have a 4CFM sander from Harbor freight (25% duty cycle so really it requires 12 to 16 CFM for on all the time performance). I charged the tanks and ran the sander without stopping and it seemed to maintain a good grinding ability at 45 psi without stopping. On the Husky 4gal the same stopped after 10 seconds, meaning I could stop the rotation of the sander with my hand. I have a blower. I can hold it ON and the air blew constant at 45 psi, down from 123 psi. The outlet diameter of the blower is about 3/32" so it is pretty wide open. The air use at 45 psi was very good and very usable so I didn't care. The tank filled from 45 to 123 psi in less than 30 seconds, I would say. It is astonishingly quick to charge. From 0 to 123 it is amazing how quick it is compared to all the other compressors I have used. It is heavy so I would not want steel tanks. It lifts with balance, however. Picking it up when it is hot could be an issue. The motor looks to be of great quality. Overall, I think the build is equal to any I have seen at Home Depot so I have no complaints. From the front it is aesthetically nice as well, better than the pictures on the websites. Dials and so on are equivalent in quality to others. I have no concern because this stuff is easy to replace with better if that is what I wish to do in the future. The parts are not expensive to upgrade, that is. Mine came with the new air release valve design California Air Tools just came out with. It was much better than that found on the Porter-Cable pan compressor which, btw, is about three times as loud as this compressor. That compressor you cannot have in the same room without having your ears ring. Anyway, it is easy to drain. I wanted Alum tanks because I plan to leave it charged so I don't want rust in the tanks. I left it charged and their was no drop in pressure at all so I was lucky with seals, I guess. The motor gets very hot. You will not be able to touch it after about 15 min of 100% on time. They say in the manual that you can have it on 100% for one hour. The filters are made of metal, not plastic. If you twist them, you will see what looks to be a mini paper -- car like-- air filter. I guess this can be replaced as the filters are made to twist in half and the paper filters, serviceable. I guess you could blow the filters out? In any case, these are not like the red filters you can get at Harbor Freight which are used for Powder Coating. I want to try Soda Blasting. I think it would work as the volume of air at 40 psi is 7CFM. I use a 12CFM air compressor to do this in a high dollar blasting cabinet and I have to dial that down to 40PSI for a better finish so I know I can be happy at 40 psi, and because the Harbor Freight 15 gal soda blaster is rated at 7 CFM at 40, I should be OK with this compressor. As my sanding tool eats air like crazy and since it seemed to be working -- good enough to sand anything I need -- at 40 psi, I believe the air is 7 cfm and believe, therefore, that the soda blasting tank should work. Overall, this is the best compressor I have used and I have used many. I don't know how long this will last. I say I'm concerned because of the temp of the motor when used heavily. However, because all other compressors I have used have plastic over the motor, I would guess that they also got very hot so I do not have a comparison for this concern. The sound is no louder than an 10" house fan set on High. I would say it is quieter, in fact. I chose this over the 10 gal 2HP California Air Tools compressor equiv. as the 10 gal does not give you any more than about 20 seconds more of time before the motor runs again. That is not worth the weight of a ten gallon steel tank. My air tools are likely going to make the compressor run all the time anyway, but it is rated for 1 hour so I should be fine and because it is so darn quiet, why should I care that the motor is on? The use of the tool is 3 time louder so why care that the motor is on as I can't even hear it over the tool? They say the motor lasts longer than the traditional, as it is electric, so if this becomes so, I will never own another type again as the sound and high CFM of this compressor is hard to fact, I don't think it has been, yet. October 20, 2013
  • 2015-11-22 T10:29:27.260-06:00
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