VIAIR 400P Portable Air Compressor Kit
- 12 volt, 414 watts, 30 amps max
- 150 PSI maximum pressure
- 2.3 CFM air flow, 0.56 horsepower
- 25 foot hose, 74 decibels
- 10.4 pounds, 10.87 x 5.83 x 7.48 inches
- 1 year manufacturer defect warranty
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
An aluminum portable unit made for topping up tires, with quick inflation and a long hose. It draws a lot of current, so it needs a battery connection that can supply it.
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ASIN: B000X9AXR8Model: 400PCategory: Air Tools
Overview
VIAIR builds this portable compressor for tire inflation from a vehicle battery supply. The aluminum body is silver, a long hose is included, and a tool kit comes with it.
The hose length and a high maximum pressure make it useful for larger tires and for reaching all four wheels from one spot. The current draw is high, so a weak outlet will limit it. The listing gives no duty cycle.
Who it's for
Owners of trucks and vehicles with bigger tires get a portable unit with reach. Shoppers with a small cigarette lighter socket should check current limits, since the listing gives a high maximum draw.
Pros and cons
- High maximum pressure
- Long air hose
- Portable with quick inflation
- Tool kit included
- High current draw
- Duty cycle not listed
- Loud under load
- Heavy to carry far
Performance notes
Inflation speed is set by airflow, and larger tires take longer at the listed rate. The motor pulls high current, so a strong battery connection helps hold the output steady. Heat builds with long runs, which is why a duty cycle matters.
Specifications
| Brand | VIAIR |
|---|---|
| Model | 400P |
| Dimensions & fit | |
| Hose Length | 25 feet |
| Item Dimensions L X W X H | 10.87 x 5.83 x 7.48 inches |
| Item weight | 10.4 pounds |
| Capacity & performance | |
| Air Flow Capacity | 2.3 CFM |
| Noise | 74 decibels |
| Capacity | 2.3 Cubic Feet |
| Power & efficiency | |
| Maximum Power | 414 watts |
| Maximum Horsepower | 0.56 HP |
| Voltage | 12 volts |
| Power Source | electric-powered |
| Construction & materials | |
| Material Type | Aluminum |
| Color | Silver |
| Included components | |
| Included Components | Tool Kit |
| Unit Count | 1.0 Count |
| Warranty & support | |
| Manufacturer Warranty Description | 1 year manufacturer defect warranty |
| Other details | |
| Maximum Pressure | 150 PSI |
| Maximum Current | 30 amps |
| Additional Features | Heavy Duty, Portable, Quick Inflation |
| Item Type Name | Portable Air Compressor |
| Part Interchange Info | 40043 |
| Recommended Uses For Product | Tire Inflation |
| Style | Original Portable |
Closest rivals on specs
BOSTITCH BTFP2KIT 2-Tool and Compressor Combo Kit- Voltage 12 vs 110 volts (-89%)
- Maximum Pressure 150 vs 90 psi (+67%)
Craftsman CMXECXA0220242 Twin Tank Air Compressor 2 Gallon- Voltage 12 vs 120 volts (-90%)
- Maximum Pressure 150 vs 125 psi (+20%)
- Hose Length 25 vs 6 feet (+317%)
Frequently asked questions
How do I look after the VIAIR 400P?
The listing gives no care steps. The warranty covers manufacturer defects for one year.
Can the VIAIR 400P run from a wall outlet?
No. The listing gives a 12 volt electric power source.
What is the VIAIR 400P used for?
The listing recommends it for tire inflation.