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VIAIR - 40045 400P-Automatic Function Portable Compressor , Silver

  • Based on 1,064 reviews
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Availability: In Stock.
Fulfilled by Amazon

Arrives Friday, Nov 29
Order within 15 hours and 50 minutes
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Features

  • 12 VOLT - 150 PSI Max Working Pressure, engine must be running during use.
  • 2.3CFM Free Flow @ 0 PSI
  • Powered direct to the car battery with alligator clamps, comes with a 40 amp in-line fuse.
  • Great for inflating tires up to 35inches on off-road and agricultural vehicles.
  • Includes deluxe carry bag for the compressor, air hose, and tire inflation gun.
  • Vibration-Resistant Diamond-Plate Sand Tray

Description

400P-Automatic is VIAIR’s first Automatic shut-off function powerful portable tire inflator. This 33% duty cycle unit is capable of pressures up to 150 PSI and can be operated for up to 40 minutes at a time before needing to be rested (at up to 40 PSI). The 400P-Automatic comes with a close-ended gas station-style air gun for added convenience. The 400P Automatic is VIAIR's first Automatic shutoff function portable compressor. Powered by an easy-to-establish temporary connection to a 12-volt battery power source, this 33% duty cycle unit is capable of pressures up to 150 PSI and can be operated for up to 40 minutes at a time before needing to be rested. The 400P Automatic comes with a range of accessories stowable in its soft carry case, including a convenient close-ended gas station-style air gun. .caption { font-family: Verdana, Helvetica neue, Arial, serif; font-size: 10px; font-weight: bold; font-style: italic; } ul.indent { list-style: inside disc; text-indent: -15px; } table.callout { font-family: verdana; font-size: 11px; line-height: 1. 3em; } td.vgoverview { height: 125px; background: 9DC4D8 url( amazon.com/images/G/01/electronics/detail-page/callout-bg.png) repeat-x; border-left: 1px solid 999999; border-right: 1px solid 999999; padding-left: 20px; padding-right: 20px; padding-bottom: 10px; width: 250px; font-family: verdana; font-size: 12px; } Portable Automatic Compression up to 150 PSI The VIAIR 400P-Automatic Portable Compressor offers inflation of up to 35-inch tires, and operation at up to 150 PSI for up to 15 continuous minutes at a time, providing that there are 30 minutes provided afterwards for the unit to cool sufficiently. More than just a compressor, the 400P is a complete portable compression system, coming complete with an inflation gun with 200 PSI air pressure gauge, a 25' extension hose with quick connect coupler and lever chuck, a heavy duty sand tray with vibration isolators, a 8' power cable, a heavy duty sand tray with vibration isolators, a 3-piece inflation tips kit, an inline fuse holder, a deluxe zippered carry bag and dual heavy duty direct battery clamps. The convenient battery clamps allow you to quickly utilize any 12-volt power source, including your own vehicle's battery, to address your air compression needs in seconds. Portable air compression up to 150 PSI suitable for tires up to 35". View larger. All your compression needs are in the bag. View larger. Heavy duty tray included for vibration control. View larger. The 400P also contains a convenient automatic time and power- saving features. The unit comes with an automatic shutoff function that will power down the 400P when the compressor is turned on, but not actively filling tires - making it unnecessary to turn the unit off between tire fills. In addition, the included closed-ended tire inflation gun allows for on-the-fly tire pressure reading, without having to turn the unit off to check tire pressure. 400P Air Compressor SpecificationsMotor voltage - 12 voltMotor type - Permanent magneticMax. duty cycle: 33% @ 100 PSIMax. working pressure - 150 PSIMax. Amp draw - 30 AmpsMax. ambient temperature - 158°FMin. ambient temperature - -40°FCFM @ 0 PSI - 2.54Built-in pressure switch - 120 PSI on, 145 PSI offFuse - 40 AmpsAuto. Reset thermal protection - YesDimensions - 11.25"L x 4.00"W x 7.00"HNet weight - 8.50 lbsAbout Compressor Duty Cycle Compressor duty cycle refers to amount of time a compressor can be operated in a given time period, at 100 PSI and at a standard ambient temperature of 72°F. Duty Cycle is commonly expressed in percentile as: compressor on time (compressor on time + off time) %. As an example, a compressor that is rated for 25% duty cycle means that compressor can be operated at: 100 PSI @ 72°F for 10 minutes on and 30 minutes off. 10 min. on / (10 min. on + 30 Min. off) = 10 min. / 40 Min = 25% duty cycle. Fill Rates: 31" x 10.5"33" x 12.5" 35" x 12.5" 0 - 30 PSI 2 min. 28 sec. 4 min. 4 min. 50 sec. 15 - 30 PSI 1 min. 25 sec. 2 min 2 min. 20 sec. What's in the Box 1-VIAIR 400P portable air compressor1-Deluxe zippered carry bag with storage compartments1-Gas station style inflation gun with 200 PSI air pressure gauge1-25' extension hose with quick connect coupler and lever chuck1-Heavy duty sand tray with vibration isolators1-Set of dual heavy duty direct battery clamps1-8' power cable1-3 piece inflation tips kit1-Inline fuse holder1-Owner's manual1-Year Limited Warranty VIAIR Corporation warrants this product, when properly installed and under normal conditions of use, to be free from defects in workmanship and materials for a period of one (1) year from its original date of purchase. This warranty covers product defects only. It does not cover incidental or consequential damages as a result of misuse or abuse. About VIAIR Corporation VIAIR offers the most complete line of air compressors and air accessories for both the on-and off-road markets available anywhere. VIAIR products are used in the OEM segment, 4x4 and Sport Air Suspension and have become the industry standard for both 12- and 24-volt automotive applications worldwide. Their compressors are currently being used in every corner of the globe, in the harshest climates imaginable and the company is recognized by its customers and peers alike as the leading manufacturer of high performance air compressors for mobile pneumatic applications. P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); From the Manufacturer 40045 Standard FeaturesPermanent Magnetic MotorDuty Cycle: 33% @ 100 PSIMax. Working Pressure: 150 PSIMax. Amp Draw: 26 Amps See more


Item Weight: ‎10.7 pounds


Manufacturer: ‎Viair Corporation


Country of Origin: ‎China


Item model number: ‎40045


Is Discontinued By Manufacturer: ‎No


Date First Available: ‎June 1, 2006


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Nov 29

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • I'm glad I bought this well made Viair air pump for our RV travels
I broke down and spent the money for a Viair portable air pump for our RV travels after reading and seeing so many glowing reviews by RVers I follow about this and the similar RV spec kit. I bought this unit instead of the RV specific model because the only apparent difference between the two I could find is the RV specific pack included long reach air nozzle for dual sets of tires for motorhomes, and a second 30-foot hose for easy reach from the pump. So I bought this model and later bought a second 30-foot hose and I'm all set for a bit less than the RV kit. I had been using an older type of 12-volt tire inflator on trips but it was not really powerful enough for our truck and trailer tires. The Viair is powerful enough and I now don't need to track down a station and try to find a higher pressure filling station, I have one with me. The unit is well made, the included storage bag is good quality, even the extra 30-foot air hose had its own well-made storage bag and it now lives in the storage compartment of out 5th wheel. ... show more
Reviewed in the United States on June 5, 2018 by JOSEPH

  • Great for big tires!
I splurged on this one. We air down our Wrangler almost every trip off-road and I wanted something dependable and a little quicker than the average pump due to larger tire size. This has been good so far. Notes: 1. You have to hook it up to the car battery and keep the engine running. Most of the faster pumps require this. The DC jack and onboard AC outlets can’t handle the higher current demand of the larger motor. 2. After adding 10-15 lbs to four 35” tires this thing gets rocket hot. I’m not kidding - you’ll burn your hand on it. I leave it out of the bag on the ride home so it cools. 3. The built in tire pressure gauge is really a nice feature. No more guessing. It reads consistently within 1-2 lbs of a handheld tester and the TPMS sensors mounted in the wheels. ... show more
Reviewed in the United States on June 25, 2018 by B. Lumadue

  • If you have 35 inch tires, you need this.
If you have 35 inch tires, you need this. The Viair 400P is the nicest personal tire pump I’ve ever owned. If you have a Smart car, or a Prius, stop reading. This is not the pump for you. As a former owner of both of those cars, I can attest to the fact that this pump is nearly as big as they are. However, if you have a large truck or other vehicle with big tires, buy it now. As the proud mama of a 2018 Ford Raptor, I can’t imagine trying to fill my tires with a little air pump that plugs into the cigarette lighter. Yes, this pump is heavy. Yes, you have to put it together and take it apart to get it in and out of the bag, but it is easy and it operates smoothly and quickly. It has a lever to secure it to the tire stem, a nice big gauge, and it operates on demand - so when you press the lever, it delivers air. 10/10 Will bore my friends with tales of the air compressor. ... show more
Reviewed in the United States on December 14, 2018 by Remove Toexposeadhesive

  • Works amazing on my 36in military RT2s
I absolutely love this air compressor! I busted a bead on my Hummer beadlocks because the internal beadlocks failed and with this compressor I was able to re-bead my tire fast with no issues. At the end of the day I was able to reinflate all 4 of my 36in tires from 6 lbs to 30 lbs in a matter of just a few minutes then I was able to lend it to two drivers so they could air up fast too!!! ... show more
Reviewed in the United States on May 22, 2018 by Roctruk Roctruk

  • Perfect For My Jeep
I love this air compressor. The product I received is not exactly what was described. I contacted Viair, and found that I had received a newer model than described with the following differences: 1. The air hose is black, and an updated version. Very happy with this. 2. The gun is a 160psi gun, NOT 200psi. This change was made because 200psi is overkill for most people. I prefer the 160psi for my use, the dial is easier to read. I love it. I have a 2015 Jeep Wrangler Unlimited. This is a perfect compressor for my needs. It is extremely easy to set up and light to carry. The air hose has more than enough length, I can get to my spare without any pulling or stretching. The compressor is quiet and quick. Using the release valve in the gun, I deflated a tire to 20psi (very quickly, great valve). I then inflated it to 36psi in less than a minute. The compressor worked beautifully. It will automatically shut off if the trigger on the gun is not depressed for a few seconds, and start again when the trigger is depressed. This compressor comes with the filter assembly ready to attach. It is easy to put on, contains a 2 part filter already, and has two spare filter sets in a separate bag. The bag is extremely nice! Very rugged, and well balanced. The compressor seems very secure in the bag, and the hose fits perfectly up front. There are two small side pockets, one with a flap and one with velcro. There is no separate pocket for the gun, though. I wish they had included this. I will find a pouch to protect the dial. As important as all of the above: Viair customer service is amazing! The rep I spoke with was very friendly and knew absolutely everything about the product. She answered all my questions quickly and was a joy to speak with. I definitely recommend this compressor. ... show more
Reviewed in the United States on January 9, 2017 by Erin McCann

  • If you air down for off roading this is your pump
I read a lot of reviews before purchasing this pump and a lot of them complained about the hose being stick and not being able to reach the rear tires. This is completely false. The hose that comes with it is black and not stiff at all. I was able to leave the pump in my engine compartment and reach my rear tires no problem. Probably had another 3 to 4 feet to go if need be. I have a 2016 4runner. Pumped up my 285/70/17 tires in a little over 2 minutes from 18psi to 35. Yes the pump gets hot. I let it cool for about 5 minutes before putting it away. ... show more
Reviewed in the United States on January 29, 2017 by Kevin W

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