VIAIR 450P Automatic Function Portable Compressor Review

VIAIR 450P is one of the best portable air compressors on the market. Contrasting to many low-priced tire inflators, this product is equipped with lots of marvelous features. This fact makes it a distinct compressor than the rest. So, let’s have a look at the details of this automatic portable compressor.

VIAIR 450P Features

This unit is 100% duty cycle and you can operate it simultaneously without cooling down it for up to 40 minutes. This is the best feature of this product and is unlike in many other compressors. It will take less time to inflate the bigger tires with air and it has the capacity to fill up 37″ x 12.5″ tires from 15 to 30 PSI within five (05) minutes. Besides, the 35″ x 12.5″ tires can be air up in just seven (07) minutes from 0-30 PSI.

The CFM rating is 0.94 at 100 PSI and the unit is designed in a way that it can handle low tire pressure, which will not drive the air tools. Additionally, it is power-driven by a magnetic motor as well as it provides 150 PSI highest working pressure. The compression system is outfitted with a switch that will save the unit from over-pressure. Plus, this switch will turn the motor off automatically, but this automation will occur when the internal pressure is at 145 PSI (it is called factory set cut-out pressure). However, if the pressure decreases to 120 PSI, then the unit will resume by design.

This compressor is constructed with an automatic shutdown utility, which will be used to move tire from tire. Additionally, you don’t need to switch it off while filling the tires, which is very unlike for a classic portable compressor. Moreover, it will be switched off when it’s not vigorously filling the tires and it will accumulate time along with effort for inflating tires fastly as well. In addition to this, it will allow you to observe the air pressure halfway through the process of tire filling.

Watch this in-depth video review of the VIAIR 450P:

There are several parts that are inducted into this 12-volt unit and a gas station-type tire gun of 200 PSI range is included as well. The inflation gun has a pressure gauge and it will permit you to understand on the fly. Additionally, it will help you to manage the air fill process comfortably. So, you don’t need to go back and forth between a tire chuck and a gauge to check the air inflating pressure. Plus, this feature will eradicate the want of an extra pressure gauge and you can easily inflate or deflate tires with this feature. Lastly, you will be able to decrease the tire pressure by a valve button, which can be found in the gun kit.

The VIAIR 450P comprises of a three (03) PC inflation tips kit, a 25 ft extension hose, and vibration-resistant diamond plate sand tray. Without moving the unit, the hose will allow you to get in touch with all the vehicle tires and also each end of the coiled hose includes a 1/4″ fast connect coupler. Additionally, there is an extra carry bag included and it contains a zippered section to include inflator or deflator hose. Many People have wished that it might come along with a hard case, but still the carry bag is a bonus for the users.

Furthermore, the dual battery system is used to attach the compressor to the car’s battery terminal and you can use the maximum of 12-volt power source by a direct battery connection as well. Nevertheless, to avoid the draining of the batteries, it is suggested that you should keep the car’s engine running whilst filling the tires. The highest amount of current will be drawn at peak pressure is 23 amperes. Plus, the inline fuse holder will guard the unit against amp spikes.

VIAIR 450P Review

This compressor has received numerous positive feedbacks from the users at At the time of this writing, this unit has an editor rating of 4.8 out of 5 and it has been proved that this product is one of the best alternatives on the market for inflating the tires. The positive reviews have been higher than the scale of three. Nonetheless, you will find negative feedbacks as well.

The users have complained that the trigger in the inflator could have a fixed locking mechanism as the user would not have to hold the trigger all the time. However, this is not a major problem, but if your knees are weak and if you have to inflate a lot of tires, then an easy locking mechanism would be a great solution. Additionally, there have been complaints about the PSI gauge system as the users pointed that it would be better off if it contains a light for nighttime operation.

Even through, the compressor has received criticism, almost all the users are contented with their purchase of the product. On top of that, if you use your vehicle frequently, then you must have a compressor that is reliable as well as it must have the capacity to inflate the tires fastly. So, on the basis of the feedback ratings and positive comments, the Viair 450P is surely an impressive compressor.

Most of the reviewers are satisfied with the overall performance of this unit and according to their reviews, this product has delivered the performance that was promised to them. Besides, the users are quite appreciative with the speed of the pump and to inflate or deflate the jeep tires, they are using the VIAIR 450P as their go-to compressor. Lastly, it has also been used for several applications as well.

This air compressor will offer great capacity of reaching with a 25-inche hose and 08-inch power cord. In addition to this, there are not many compressors that are created with such additional long hose that is capable of reaching the rear tires. So, you will not any more drag the compressor from wheel to wheel. Apart from this, many users have praised the pressure gauge of this unit for its big display and accuracy. Also, the users have only positive things to say about the low-noise level and less vibration.


Finally, I would say that the VIAIR 450P is an exceptional pick for a portable air compressor and this statement is provided on the basis of great user ratings and comments. Time has come for you to abandon the low-class cigarette lighter compressors and to inflate the tires or any inflatable items; you must opt for this wonderful compressor. It is flexible enough to solve your entire tire inflating problems. So, you must grace it with open arms because it is worth trying. Do check out other VIAIR compressors reviews too!