VIAIR Corporation

400P-Auto Portable Compressor

For up to 35" Tires

150 PSI / 2.30 CFM P/N 40045

400P-Automatic is VIAIR’s first Automatic shut-off function portable compressor. This 33% duty cycle unit is capable of pressures up to 150 PSI and can be operated for up to 40 minutes at a time before needing to be rested (at up to 40 PSI). The 400P-Automatic comes with a close-ended gas station-style air gun for added convenience.

Portable compressors with 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.

Please Note: The air hose supplied with this kit may become brittle from prolonged exposure to UV/sunlight. - Stow when not in use. Never allow the hose to come into contact with the head of the compressor during use (melting hazard). The use of the included air hose is not recommended in sub zero or freezing conditions. The 400P-Automatic does not work with Presta bicycle valves.

tire inflation icon

Features:
- Gas Station-Style Tire Gun with 160 PSI Gauge
- Quick Connect Air Hose with Heat Shield
- Vibration-Resistant Diamond-Plate Sand Tray
- Deluxe Dual Compartment Carry Bag
- 40-amp Inline Fuse Holder
- Dual Battery Clamps
- 3 pc. Inflation Tips Kit

Recommended Components:
- 30 ft. Extension Hose (P/N 00030)


- 12-Volt
- Permanent Magnetic Motor
- Duty Cycle: 33% @ 100 PSI
- Max. Working Pressure: 150 PSI
- Max. Amp Draw: 30 Amps
- Ingress Protection Rating: IP54
- Dimensions: 10.9"L x 5.8"W x 7.5"H
- Net Weight: 10.70 lbs.
- Power Cord Length: 8 ft.
- Air Hose Length: 30 ft.

User Manual
Dimensional Drawings

PSI CFM A BAR LPM A
0 2.30 17 0 65.1 17
10 2.13 19 1.0 58.4 20
20 1.98 21 2.0 53.0 23
30 1.86 23 3.0 48.5 24
40 1.75 24 4.0 44.2 26
50 1.64 25 5.0 40.2 27
60 1.54 26 6.0 37.0 28
70 1.44 27 7.0 33.3 29
80 1.37 27 8.0 30.1 28
90 1.28 28 9.0 27.0 28
100 1.19 29 10.0 22.1 27
110 1.11 29  
120 1.04 28  
130 0.95 28  
140 0.85 27  
150 0.71 27 * Supply Voltage: 13.8 Volts

31" x 10.5" Fill Rate
0 to 30 PSI 3 min. 00 sec. (± 10 sec.)
15 to 30 PSI 1 min. 35 sec. (± 05 sec.)
33" x 12.5" Fill Rate
0 to 30 PSI 4 min. 20 sec. (± 10 sec.)
15 to 30 PSI 2 min. 05 sec. (± 05 sec.)
35" x 12.5" Fill Rate
0 to 30 PSI 5 min. 20 sec. (± 15 sec.)
15 to 30 PSI 2 min. 45 sec. (± 10 sec.)
RV Tires 275/80R22.5 Fill Rate
80 to 90 PSI 30 sec. (± 05 sec.)
90 to 100 PSI 3 min. 50 sec. (± 10 sec.)
110 to 130 PSI 4 min. 37 sec. (± 15 sec.)



 
WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.