VIAIR 400P Portable Air Compressor Kit
- Capacity: 17.2 gallons
- Air Flow Capacity: 2 CFM
- Maximum Pressure: 150 psi
- Maximum Power: 0.56 hp
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A 12 volt portable compressor with enough weight and power source to handle larger tire airing jobs on the road.
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ASIN: B000X9AXR8Model: 400PCategory: Air Tools
Overview
The VIAIR 400P is a portable 12 volt electric air compressor weighing 10.4 pounds, built for airing up tires away from a shop compressor.
VIAIR's compressors are a common choice for topping off truck, SUV, and trailer tires from a vehicle's own electrical system rather than hauling around a shop unit. At over 10 pounds it sits on the heavier end for a portable unit, which typically points to a higher air output than smaller emergency inflators.
- Electric powered
- 12 volt operation
- 10.4 pound weight
- VIAIR brand
Who it's for
Good for a truck, RV, or trailer owner who wants to air up larger tires on the road without a garage compressor. Less suited to someone who only needs an occasional quick top off on a passenger car tire, where a smaller and lighter inflator would be easier to store.
Pros and cons
- 12 volt operation works directly off a vehicle's power
- Weight suggests stronger output than compact inflators
- Suited to larger truck and trailer tires
- Heavier and bulkier than compact emergency inflators
- Exact air output (CFM or PSI) not listed here
Performance notes
Running off a 12 volt electric supply, the 400P draws power directly from a vehicle battery or outlet, and its 10.4 pound build suggests a larger motor and pump than compact emergency inflators, translating to faster fill times on bigger tires.
Specifications
| Brand | VIAIR |
|---|---|
| Model | 400P |
| Dimensions & fit | |
| Hose Length | 25 feet |
| Item Weight | 10.4 pounds |
| Item Dimensions L X W X H | 10.9 × 5.8 × 7.5 inches |
| Capacity & performance | |
| Capacity | 17.2 gallons |
| Air Flow Capacity | 2 CFM |
| Noise | 74 dB |
| Power & efficiency | |
| Maximum Power | 0.56 hp |
| Maximum Horsepower | 0.56 hp |
| Power Source | Corded Electric |
| Voltage | 12 volts |
| Construction & materials | |
| Material Type | Aluminum |
| Color | Silver |
| Included components | |
| Unit Count | 1 |
| Included Components | Tool Kit |
| Warranty & support | |
| Manufacturer Warranty Description | All VIAIR products come with a One Year Manufacturer Defect Warranty |
| Other details | |
| Maximum Pressure | 150 psi |
| Additional Features | Heavy Duty, Portable, Quick Inflation |
| Recommended Uses For Product | Tire Inflation |
| Item Type Name | Portable Air Compressor |
| Style | Original Portable |
| Maximum Current | 30 Amps |
| Part Interchange Info | 40043 |
Closest rivals on specs
BOSTITCH BTFP2KIT 2-Tool and Compressor Combo Kit- Voltage 12 vs 110 volts (-89%)
- Capacity 17.2 vs 6 gallons (+187%)
- Air Flow Capacity 2 vs 3 CFM (-33%)
Craftsman CMXECXA0220242 Twin Tank Air Compressor 2 Gallon- Voltage 12 vs 120 volts (-90%)
- Maximum Power 0.56 vs 0.34 hp (+65%)
- Capacity 17.2 vs 2 gallons (+760%)
Frequently asked questions
What power source does the VIAIR 400P use?
It runs on 12 volt electric power, typically from a vehicle's system.
How much does it weigh?
10.4 pounds.
Is this a compact emergency inflator?
No, its weight suggests a larger pump built for tougher airing jobs than small emergency units.