VIAIR 400P-RV/40047 Automatic Portable Compressor, Tire Inflator Kit, Air Compressor for RV, Truck, Jeep, and SUV Tires, Portable Air Pump Kit, RV Accessories, 150 PSI/2.30 CFM

Quality. Ive bought 3 or 4 portable ones thru my life. Should have just bought this. Very nice.You get what you pay for. This is awesome. Even the quick connects are nice. The hose will hold air for months after disconnecting and storing!

My RV tires are 245/70R19.5 and need to be inflated to 100 to 110 PSI, depending on the load, so this is significantly more difficult than a normal 35 psi car tire. My RV does not have a spare tire, so proper inflation is extra important.I also own a Bon-Aire BA121L 120V compressor with a claimed 2/3 HP I can run with the RV generator, but in testing it on an RV tire ( taking them from 40 to 100 PSI ) I had to quit after 25 minutes ( including 10 minutes of cool down time in the middle, per the manual ) at just 90 PSI when the compressor started to smoke.I replaced it with the Viair 400P-RV. I looked at the 450P, liking the continuous duty, but the 400P puts out more air, so the higher fill rate of the 400P seemed like a good idea. Also, it comes with all the parts you need to remotely fill a high pressure, high volume tire which, if it explodes while you're squatting next to it, can easily kill you. If you doubt this, do a search on youtube for "tire explosion" and you'll be convinced.First impression: It's solidly built and comes with a nice selection of accessories, including two extra air filters, toy and needle attachments, 60 feet of coiled hose in two 30 foot segments and a hand held valve so you can stand well away from the tire while filling. It has an air filler wand and a screw-on filler. The bag it comes in could be little more rugged, but it's not too bad.It's also pretty big, with a bulge on the front of the bag for one of the coiled hoses and another on the back for the other hose. In the bag it's actually not that much smaller than some of the smallest 120V compressors that I've seen.But this is smaller and lighter and runs on 12V, so I can use with my towed Jeep, too.The compressor has a pressure switch on the back by the on/off switch that turns the motor off when it gets to about 150PSI, so you can leave the compressor on without worrying about damaging it or the hoses by over-pressurizing them if it's not connected to a tire. Nice touch.To test the Viair, I dropped the pressure in one tire to 40 PSI and connected the compressor. The inline gauge read the same as my regular gauge when it wasn't filling, but it read very high while the air is going in. Just pause the filling to get an accurate reading. The compressor seemed to be filling the tire pretty quickly which was good because you have to hold the "trigger" on the valve open to fill the tire. At least it's easy to hold open, so it's not too difficult.I would release the "trigger" to check the pressure every couple of minutes and in the few seconds it would take for the pressure in the gauge to equalize with the tire, the pressure switch on the compressor would shut it off. It would kick right back on as soon as I continued to flow air into the tire.About 7 minutes after I started ( probably about 6:30 in actual compressor run time ) the tire was at 100 PSI and I stopped the test. This is significantly less than the listed duty cycle, which means it could have run longer if it needed to.I lost a little pressure taking the filler off the tire and putting my pressure sensor back on, but when I turned my tire pressure monitor system on it said the tire was at 98 PSI. That's pretty close to what the gauge read.The cylinder head on the compressor and the air line were hot to the touch, but the motor exterior was just moderately warm. I had to let it sit for about 10 minutes before I was comfortable putting it in the bag.I'm pleased that it can fill a large tire to a high pressure with some reserve capability left over. It's not cheap, but it's a good compressor and includes everything you need to fill an RV tire, or all 4 tires on your 4x4 if you use it in the sand. The Bon-Aire is going in the yard sale, this is going in the tool compartment on the RV.

After a recent tire mishap and replacing all four tires on an RV trailer, we discovered when departing that the tires were installed with lower pressure than we wanted. After topping them off with a commercial pump (that was *slow*), we had more problems during the trip with the valve stems and had to look for tire pumps and tire shops to repair and keep going.That motivated us to buy the VIAIR 400P-RV based on reviews from camping YouTubers. It'd been on my wish list for a while, but I finally took the plunge.This is thing is awesome. It's very fast. Whereas the commercial pump took 12+ minutes to top off each trailer tire (from 38psi to 80psi), this VIAIR pump took 3 minutes 20 seconds for the same range.It is shockingly quiet. While testing it out with the trailer, I wasn't sure it was on being away from me up at the front of the trailer.The carry bag makes it easy to keep with me and even at home, just to pull it out and check/top off the automobile tires. I used to use a small 2-gal A/C pump at home, but it was getting tiresome to run extension cord to an outlet, reach the car, and wait for it to come up to pressure. This VIAIR pump is quick and easy to just pop out, hook to a battery, and top off the tires.I shouldn't have waited so long to get it.The included tools are nice, but I prefer a separate digital gun gauge I already had which is much easier to attach to valve stem. It clips on and off the stem, making it so I don't have to press it while pumping. The VIAIR pump does come with a screw on chuck which I don't need to press on while pumping, but the clip on/off is much quicker.

I used my VIAIR 400P-RV tire inflator for the first time today. Unpacking and set up was easy. I really love the screw on air chuck, Inflation gun and gauge. What's nice for me is the gauge is in five psi increments which works well for my 21575R14 load range D tires. This unit comes with two air hoses but I don't think I will ever need the second hose. My RV is only twenty five feet long.

I use this on my Class C Motorhome to air up the tires as needed. It is compact enough to store away easily but also powerful and fast enough for my RV tires. Made to the highest of standards for material and fit and finish. It's costly but they also give you your money's worth.