Viair 40045 400p Automatic Portable Air Compressor 150psi 35″ Tires


Viair’s 40045 400P Automatic  is great for fast airing of anything from small car tires all way to large 35″ truck or trailer tires.  The 400p AUTO offers an automatic shut-off function in a larger powerful portable tire inflator. The 400P Automatic powerful portable tire inflator kit will inflate 275/80/22.5 tires from 80 to 90 psi in just 30 seconds. While the unit is intended for RV use, it can be used for virtually any tire since it comes with accessories for more varied inflating situations than any other portable compressor kit on the market today.       See item description for video & more details.

6 in stock


Viair 45045

Viair 40045 400p Automatic Portable Compressor
150psi 33% Duty at 100psi
Designed for Large Tires – 35”

The Viair 40047 is one of  Viair’s Most Powerful Portable Air Compressor.
The 400p Auto Air Compressor is fast filling and 33% Duty at 100psi
These are perfect for filling large truck or RV tires up to 35″ in size
The 400p Automatic also works great for 5th Wheel Travel Trailers.
This 400p Auto shuts down automatically when you stop airing a tire and move to the next tire..
The user does not need to shut compressor off between tires or air pressure checks.
The kit includes an extra long 30 foot air hose


VIAIR 40045 Kit Specs:

VIAIR 400p Auto Portable Compressor
Permanent Magnetic Motor
Max. Working Pressure: 150psi
Duty Cycle: 33% Duty @ 100psi.
Duty Cycle Explained-CLICK HERE
12 Volt DC
Permanent Magnetic Motor
Max. Amp Draw: 30Amps
Ingress Protection Rating: IP54
Compressor Dimensions (each): 10.87” L. x 5.83” W. x 7.48” H.
Net Weight: 10.75 lbs
Power Cord Length: 8 feet
Air Hose Length: 30 feet

This Kit Features:

400p Compressor Pewter Body Finish
Thermal Overload Protector
Automatic Shut-Off Function
Quick Connection Extension Air Hose w/Heat Shield
Vibration-Resistant Diamond-Plate Sand Tray
Heat Shielded Quick Connect Coupling
Gas Station-Style Tire Inflation Gun with 160 PSI Inline Gauge
Heavy Duty Dual Battery Clamps with Inline Fuse
Heavy Duty Deluxe Carry Bag
3 pc. Inflation Tips Kit
Complete Instructions Included
Free U.S. Based Tech Support
VIAIR 1 Year Warranty

400p Auto Tire Fill Rate
Tire Size-31″ x 10.5″
0 to 30 PSI – 3 Min. 00 Sec.
15 to 30 PSI – 1 Min. 35 Sec

Tire Size-33″ x 12.5″
0 to 30 PSI – 4 Min. 20 Sec.
15 to 30 PSI – 2 Min. 05 Sec.

Tire Size-35″ x 12.5″
0 to 30 PSI – 5 Min. 20 Sec.
15 to 30 PSI – 2 Min. 45 Sec.

RV Tires 275/80R-22.53
80 To 90 PSI – 0 Min. 30 Sec.
90 To 100 PSI – 3 Min. 50 Sec.
110 to 130 PSI – 4 Min. 37 Sec.

Viair 400p Automatic Performance Data:
0 PSI – 2.62 CFM / AMPS – 16
50 PSI – 1.93 CFM / AMPS – 25
100 PSI – 1.45 CFM / AMPS – 27
150 PSI – 1.01 CFM / AMPS – 26

Need a LARGER, more Heavy Duty Compressor??
Give Us A Call And We Can Assist You- CLICK HERE

Viair 40045 400p Automotive Portable Air Compressor

Viair 40045 400p Automatic Air Compressor is perfect for airing tires up to 35″ The Viair Portable Compressor can be used for airing anything from inflatable toys to large truck tires.

The kit includes the a service station style airing gun.  Just pull the trigger and let the 400p-Auto do the work.  The automatic shutoff come into play when moving from tire to tire, and when checking tire pressure in the middle of a tire fill. A typical portable compressor must be turned off between tire fills, and anytime you want to check tire pressure. If you aren’t near the compressor, this can turn into running laps back and forth to the portable compressor to turn the unit on and off. Automatic portables do not work in this fashion and will save you time & effort to get tires inflated quickly.

Advantages to the Viair 40045

This Viair 40045 is a portable air compressor that can produces a whopping 150psi. The Viair 400p Auto compressor is 33% Duty at 100psi.  This Viair 40045 kit uses a small but mighty 400p compressor that will fill your 31” x 10.5” tires from 0-30 psi in just 3 minutes.

Purchase with confidence, we are an Authorized VIAIR DEALER.

Check Out Instructional Video Below.


Check Out 450p Filling Tractor Tire Video.

*For Continental U.S. Shipments ONLY

Additional information

Weight 18 lbs
Dimensions 16 × 14 × 11 in


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