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VIAIR 450P-Automatic Portable Compressor Kit (12V, 100% Duty, 150 PSI)

450P-Automatic Compressor

450P-Automatic offers an automatic shut-off function in a larger powerful portable tire inflator. This 100% 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. The 450P-Automatic comes with a close-ended gas station-style air gun for added convenience.

Automatic Shutoff

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.


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


– 12-Volt
– Permanent Magnetic Motor
– Duty Cycle: 100% @ 100 PSI
– Max. Working Pressure: 150 PSI
– Max. Amp Draw: 23 Amps
– Ingress Protection Rating: IP54
– Dimensions: 12.4″L x 5.8″W x 7.5″H
– Net Weight: 13.05 lbs.
– Power Cord Length: 8 ft.
– Air Hose Length: 30 ft.

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Supply Voltage: 13.8 Volts

Fill Rates

31″ x 10.5″Fill Rate
0 to 30 PSI4 min. 05 sec. (±10 sec.)
15 to 30 PSI2 min. 10 sec. (±05 sec.)
33″ x 12.5″Fill Rate
0 to 30 PSI5 min. 30 sec. (±15 sec.)
15 to 30 PSI2 min. 50 sec. (±05 sec.)
35″ x 12.5″Fill Rate
0 to 30 PSI6 min. 55 sec. (± 15 sec.)
15 to 30 PSI3 min. 30 sec. (± 10 sec.)
37″ x 12.5″Fill Rate
0 to 30 PSI7 min. 56 sec. (± 15 sec.)
15 to 30 PSI4 min. 09 sec. (± 10 sec.)


Additional Info Download:

Manual ‣
Dimensional Drawing ‣

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 450P-Automatic does not work with Presta bicycle valves, unless used with a Presta Valve Adapter. The 450P-Automatic does not work with the VIAIR Winterization Kit 

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