VIAIR 400P - 40043 Portable Compressor Kit. Tire Pump, Truck/SUV Tire Inflator, For Up to 35 Inch Tires

As someone getting into off-roading, having a air pump is a must after airing down and hitting the trails. After extensive research and reading Amazon reviews, we chose this one. It has worked flawlessly so far and I feel great about the build quality, especially since there is a warranty. When using, it does get a bit hot so don't touch the hose to the body while in use. Otherwise I expect this pump to bring us happiness after off-roading for years to come.

I first purchased a Viair 88P from amazon. When I received it the unit did not work properly out of the box. I immediately returned it to Amazon because of a factory defect and decided to order the 400P model because of its greater capacity to move air. I tested it on a SR225-75 large travel trailer tire as soon as I received the unit and was pleased with the results. It inflated the tire to 55psi in about 3 minutes. The cylinder was warm but not hot to the touch. The unit is larger and heavier than the 88P but was worth it because of its much greater capacity to get the job done. It comes with a cloth case that is adequate but not what you would consider heavy duty. It does keep all of the components in one place when needed. The size of the 400P in its case is to large to place under most passenger car seats but could be stored in the trunk or pickup truck tool box. If the components were separated without the case, they might fit under some passenger car seats. The removable air hose is coiled and compact and easily stretched out from the front of my 38' RV to the rear tires. Since it is equipped with an industrial type hose quick connector other hoses or extensions could be added but would probably not ever be needed. I would purchase this unit again and would highly recommend it to others along with a quick external tire puncture repair kit particularly if you drive long distances in rural areas.

I’ve been trying to find a portable tire pump that works on truck tires for along time. I finally found one! My rear truck tires need to be pumped up to 80 lbs when towing my travel trailer. My travel trailer tires need 75 lbs. The cheap little air compressors you can get at Walmart or here on Amazon we’re not up to the task. Several of them boasted 150 psi capable, but wouldn’t go past 73 psi. Took a chance on this one and what do you, it fricking works great. It’s fast, quiet, and doesn’t heat up to ridiculous temperatures. The pressure gauge is accurate (I checked using my other tire gauge). The size of the pump is small enough to fit in my kit and the included carrying bag keeps everything organized. So far, I couldn’t be happier.

Short version.... I bought this to use with my 31 ft. Class C motorhome and found that it really was not suitable for that application. The air line is too short and the type of chuck (locking and non-interchangeable) does not work well for dually tires. For cars, trucks, SUVs and other vehicles, this product should work well. I want to be clear that my bad experience with the product was the result of my choosing the wrong product and then trying to force it to do what it isn't suited to do. Long version... Bought this in an attempt to go cheaper than the 400P Auto RV version. When I aired up my front tire, it worked like a charm. It got the tire from 70 to 80 psi in less than a minute. However, when I tried to air up an inside dually tire, things went very wrong. With the locking chuck, the only way you'll get to the inside dually is with an air stem extension..which I had. Although the coiled line is listed as 30 ft, you really can't get anywhere near that distance because of the coiling. I had to pull it a little tight to get it to the rear tires. I clamped the chuck on the stem extension and let go of it to go turn the unit on. When I got back to the rear tire, I could hear air leaking. When I grabbed the line and chuck to disconnect it, the stem extension pulled free of the tire and the tire deflated. So, basically, the tension of the coiled line was enough to break off the tire stem. Great, I pulled the inside dually off and headed to Pep Boys to get the tire repaired. While I was there, I figured I'd just buy a longer non-coiled air line and a different chuck and make that work. That also did not end well. Attempting to air up the rear tire again (and teach my son how to do it at the same time) I let the compressor run too long. It became (predictably) very hot. The heat caused my brand new air line to fail at the compressor end...POP!. Lessons learned: Coiled lines are fine, as long as you have plenty of length to service your vehicle. Otherwise, they're gonna cause stress on your valve stems if they are clipped or screwed on. Duty cycles of air compressors should never be exceeded (duh!) and an automatic compressor that only runs when air is actually flowing will go a long way to keeping the compressor from overheating. If you have a long vehicle, or one with dually tires, step up and buy the more suitable version of this product. The Viair 40047 400P-RV Automatic. Final tally? No loss on the compressor because I've exchanged it with amazon and my new 4009_RV Automatic version is on the way. I lost a couple of hours of work in the Arizona sun changing the dually, the cost of chucks and connectors I bought for my failed work around and $20 to have the tire repaired. I did get my money back on the air line, though I would not have blamed them for not refunding that to me. Basically, I'm out $50 and hours of work because I tried to save $100...that I'm gonna end up spending anyway.

The VIAIR 400P portable air compressor is a game-changer in the world of on-the-go inflation. With its impressive power and user-friendly design, it's become an essential tool in my automotive arsenal. The first thing that struck me was its sheer power. Capable of reaching a maximum pressure of 150 PSI, the 400P effortlessly handled my car tires, bike tires, and even inflatable water toys. Its fast inflation speed meant I spent less time waiting and more time enjoying my outdoor activities. Portability is a strong suit for the 400P. Its compact size and ergonomic handle made it a breeze to carry around, and the included carry bag added an extra layer of convenience. Whether I'm on a road trip or a weekend camping adventure, the 400P is always ready to assist. The built-in pressure gauge is a nifty feature, allowing me to monitor and adjust inflation with precision. The integrated LED work light proved to be incredibly handy during nighttime use, making the whole process smoother and more efficient. While not whisper-quiet, the 400P's noise level is manageable, making it suitable for various settings without causing a disturbance. In summary, the VIAIR 400P offers an unbeatable combination of power and convenience. It's a reliable and efficient companion for any outdoor enthusiast, providing peace of mind and timely inflation whenever and wherever you need it. If you're looking for a portable air compressor that delivers on its promises, the VIAIR 400P is the one to get.

Super fast inflation time on my 33s. Looks like a great quality. Definitely be using this on my offroad activities.

This pump is Fast. I aired up my 225 75 R16 All terrain tires from 30 psi to 70 psi. First, I used the pump that came with my promaster van and it took 15 minutes. Then I used the Viair and it only took 2 minutes and 25 seconds!! Great pump.

When I go off road I always Air Down tires. I visit 4x4 beach NC frequently. Also Hatters National Park ORV beaches. My pump never lets me down. runs a little warm “HOT” to touch after pumping up to 55psi. but it does not die on me like a battery operated ones before. since it hooks up to battery terminal it is easy to assist a friend. ref. own Silverado 2500HD, GMC Yukon XL. Pros Great power “pumps any size tire” 1/2 ton or 3/4 ton pickup Easy conector 5stars Long hose 5stars Reaches all 4 tires 5stars Easy inflation connection quick connect Portable easy to carry around Power source easy to use Cons HOT to handle “but other reviews mentioned it” no big deal Cost more than other’s inflators Power source may intimidate novice inexperienced drivers