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VIAIR 300P Portable Compressor - 30033

4.8 out of 5 stars 1,344 ratings
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Brand VIAIR
Model Viair
Power Source Electric
Item Dimensions LxWxH 10 x 7.5 x 5 inches
Voltage 12 Volts (DC)

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  • Fit Type: Universal
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Frequently bought together

  • VIAIR 300P Portable Compressor - 30033
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Total price: $236.76
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Product description

Product Description

300P is a larger powerful portable tire inflator kit that is capable of inflating up to 33-inch tires easily by simply clamping the power leads to your battery, connecting the tire chuck to the valve stem and turning the unit on. Tire pressure can be checked using the 5-in-1 Inflator/Deflator inline pressure gauge.

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VIAIR's 300P is a larger portable compressor kit with a 150 PSI rating that is capable of inflating up to 33-inch tires easily by simply clamping the power leads to your battery, connecting the tire chuck to the valve stem and turning the unit on. Tire pressure can be monitored using the 5-in-1 inflator/deflator inline pressure gauge. This compression system includes a range of accessories stowable in its soft carry case, including inflation tips, a 5-in-1 inflator/deflator open ended air hose with 100 PSI gauge, dual heavy duty direct battery clamps and more.

VIAIR logo
Powerful Portable Compression Rated for 33" Tires
The VIAIR 300P Portable Compressor offers inflation of up to 33-inch tires at a rapid rate, 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. The unit is powered by an easy to establish temporary connection to a 12-volt battery power source via included alligator clamps. The 300P comes with an open-ended tire inflation hose with included 100 PSI air pressure gauge that offers the following functions: air up, air up intermittently, air down, air down intermittently and check tire pressure. To check tire pressure, simply turn off the portable compressor to halt inflation and check the pressure on the air pressure gauge. Additional parts provided include an inline fuse holder, a 8' power cable, a heavy duty sand tray with vibration isolators and deluxe carry bag.

VIAIR 300P Portable Compressor in packaging
Portable air compression up to 150 PSI suitable for tires up to 33".
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VIAIR 300P Portable Compressor with included accessories
All your portable compression needs are in the bag.
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VIAIR 300P Portable Compressor with included vibration resistent tray
Heavy duty tray included for vibration control.
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300P Air Compressor Specifications
  • Motor voltage - 12 volt
  • Motor type - Permanent magnetic
  • Max. duty cycle: 33% @ 100 PSI
  • Max. working pressure - 150 PSI
  • Max. Amp draw - 28 Amps
  • Continuous use @ 72°F & 30 PSI - 40 min
  • Max. ambient temperature - 158°F
  • Min. ambient temperature - -40°F
  • CFM @ 0 PSI - 2.40
  • Fuse - 40 Amps
  • Inline pressure gauge - 100 PSI
  • Auto. Reset thermal protection - Yes
  • Dimensions - 9.80"L x 4.90"W x 7.50"H
  • Net weight - 8.60 lbs
About 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:

 
35" x 12.5"
37" x 12.5"
0 - 30 PSI
5 min. 25 sec.
2 min. 00 sec.
15 - 30 PSI
5 min. 00 sec.
2 min. 45 sec.

What's in the Box
  • 1-VIAIR 300P portable air compressor
  • 1-Deluxe zippered carry bag with storage compartments
  • 1-25', 5-in-1 inflator/deflator open ended air hose with 120 PSI gauge
  • 1-Heavy duty sand tray with vibration isolators
  • 1-Set of dual heavy duty direct battery clamps
  • 1-8' power cable
  • 1-3 piece inflation tips kit
  • 1-Inline fuse holder
  • 1-Owner's manual
1-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.

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From the manufacturer

VIAIR 300P VIAIR 400P VIAIR 400P-Auto VIAIR 440P VIAIR 450P-Auto
Max Pressure 150 PSI 150 PSI 150 PSI 150 PSI 150 PSI
Duty Cycle 33% at 100 PSI 33% at 100 PSI 33% at 100 PSI 33% at 100 PSI 100% at 100 PSI
CFM Output 2.3 CFM 2.3 CFM 2.3 CFM 3.0 CFM 1.8 CFM
Max Tire Recommended Tire Size 33" 35" 35" 37" 42"
Automatic?
Max Amp Draw 30 Amps 30 Amps 30 Amps 44 Amps 23 Amps

Customer Questions & Answers

Customer reviews

4.8 out of 5 stars
4.8 out of 5
1,344 global ratings
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Top reviews from the United States

Reviewed in the United States on May 17, 2020
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5.0 out of 5 stars Fantastic - I added a 50' hose
By scooterbrown on May 17, 2020
I've had this compressor for over a year. I bought it mostly for emergency use, but I do use it to maintain proper tire pressure. I don't really like the coiled hose that came with it because I have to stretch it out pretty far to reach the back tires and it can't reach trailer tires. I also don't like the fact that the pressure gauge is at the tire - this means you have to go back and forth between tire and compressor (turn off compressor, check tire pressure, turn on compressor, etc). I got a 50' 1/4" Flexzilla hose, bore lock-on air chuck, 1/4" tee, pressure gauge, 1/4" elbow, small 8.5" hose, and some quick-connects. With this setup I can stay at the compressor and check the psi until it's dialed in. The setup seems to work well so far. Now I just keep the coiled hose in the bag as a spare.
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53 people found this helpful
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Reviewed in the United States on December 17, 2015
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4.0 out of 5 stars An excellent Portable Compressor (but not perfect)
By simataas on December 17, 2015
I wanted a portable, reliable, high quality, quick & powerful tire inflator. This product has all of those qualities in spades! It is probably way more compressor than I need for my three passenger vehicles: a small commuter car, a minivan and a full size van. This obviously durable product comes with a quality carrying/storage case. It inflates fast! Do not walk away from this product while it is in use (there is no auto-shutoff and, again, for normal size passenger tires it will quickly raise pressure). It is also surprisingly quiet while operating compared to the cheap inflator I purchased at Lowe's (two of which broke down on me in as many years, which prompted my search for a quality product).

This is easily a 4.5 star product, but I'm consciously choosing to not round up to 5 stars because there are some design flaws that should be addressed:

1) The 25' long extension coil hose that comes included is really only going to give you 12 feet or so of working distance (i.e. for those working solo). You won't be comfortable stretching the coil out all the way. Even if you tried, the tension would cause the portable compressor to be dragged around on the ground. You can get further distance with a second person - one to hold & operate the compressor and one to attach the tire chuck & read the pressure gauge (keeping hold of the coil to relieve tension from the tire valve). I understand that these coiled hoses are designed to operate this way, but ideally the power cord, the coiled hose itself, or both would be longer. The easiest solution would be to double the length of the power cord - it is not bulky and the carrying case would easily accommodate the added length. The current design is unable to reach from my full-size van's battery to the opposite rear tire. Another reviewer provided the ingenious solution of using jumper cables to extend the working distance of the portable compressor - it was a brilliant suggestion that worked perfectly for me!

2) Oddly, the clamp-on tire chuck ("lever style tire chuck") is a bit deep. What I mean is that the tire valve must be inserted into the chuck quite far for it to engage properly to allow air flow. I purchased this particular Viair model in large part because I wanted the clamp-on style chuck versus a screw-on connection. Unfortunately, my van has chrome valve stems (see picture) that are beveled just enough, such that I cannot get the tire chuck on far enough to properly engage. My solution was to purchase an adapter ([[ASIN:B017CW5S9G Fafada® Motorcycle Motorbike Tyre Valve Extender Adapter Car Bike 2 Pcs/Pair (90 Degree)]]), but that means I'm back to a screw-on connection. Too bad - it seems like being able to insert the entire threaded portion of the Schrader valve into the tire chuck should be enough, but it's not.

3) One must turn the compressor off to get an accurate tire pressure reading. The power switch is, naturally, on the compressor, but the pressure gauge is way over at the tire. The whole 25' coil is pressurized at the same pressure as the tire. It would make more sense to install the gauge at the end of the coil that attaches to the compressor (where the on/off switch is). This would make for better control and easier monitoring. A longer hose or power cord as discussed above would make this a non-issue.

The three flaws above are the difference between an excellent product and a perfect product. While they prevent me from giving a perfect 5 star rating, they should not deter anyone from purchasing this excellent portable compressor.
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182 people found this helpful
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Reviewed in the United States on October 17, 2016
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5.0 out of 5 stars Worked great and as advertised!
By D.H on October 17, 2016
Aired up all 4 tires from 18 psi to 33 psi all within maybe 15 minutes give or take after a whole day of off roading. Did get hot but did not overheat and shut off. I have 295/70/17 tires.
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141 people found this helpful
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Reviewed in the United States on March 27, 2017
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62 people found this helpful
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Reviewed in the United States on May 15, 2017
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49 people found this helpful
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Reviewed in the United States on June 16, 2017
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47 people found this helpful
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Reviewed in the United States on December 6, 2020
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4.0 out of 5 stars Move the gauge to the compressor and I'll give you five stars
By mickey on December 6, 2020
The compressor works well but has a design flaw. The pressure gauge is next to the tire but the switch is located on the back of the compressor. I called customer support to ask if they had a solution to this little problem. Their answer was to go with $100 more expensive unit. They didn't seem to understand that there was any problem. I copied the design of another Amazon reviewer. I used galvanized fittings to put the gauge in the proper location at the back of the compressor. This way I can turn it off when it hits the right pressure. This becomes more important when you're filling up something smaller. I was told not to touch the quick connector in the back of the handle because they would void the warranty. I hope someone from the company reads this and changes the design. I am very happy with my purchase. It would've been five stars had a change this one problem.
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10 people found this helpful
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Reviewed in the United States on June 23, 2018
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19 people found this helpful
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