VIAIR 450P-RV 12V Automatic Air Compressor for RVs & Trucks — 150 PSI, 1.80 CFM, Auto Shutoff

Whether you're heading out in a Class A motorhome, hauling a trailer, or driving a heavy-duty truck, having a compact, automatic inflator that handles big tires gives confidence on the road. The VIAIR 450P-RV combines a 150 PSI maximum, a 1.80 CFM free-flow rate and an automatic pressure cut-off for hands-free cycling, all packaged with a gas-station style inflation gun and a heavy-duty carry bag for easy storage.

How does the automatic pressure operation simplify inflating large tires?

The 450P-RV uses an integrated pressure sensor that stops and restarts the unit as needed while the inflation gun remains engaged. That means you can check pressure and move from tire to tire without manually flipping the compressor on and off—reducing fuss and speeding up multi-tire jobs.

• Integrated pressure cut-off cycles compressor automatically.
• Close-ended gas-station style inflation gun lets you check pressure mid-fill.
• Maintains set pressure without constant supervision.

Can this compressor handle RV and truck tires, and how fast is it?

The unit is engineered for large tires up to about 42 inches, making it suitable for Class A motorhomes, trailers, trucks, SUVs and Jeeps. With a 1.80 CFM free-flow capacity and a maximum working pressure of 150 PSI, it offers steady inflation power for heavy-duty tires while the vehicle engine runs.

• Up to 150 PSI maximum working pressure for high-pressure tires.
• 1.80 CFM free-flow rate for continuous inflation performance.
• 100% duty cycle at 100 PSI and up to one hour of operation intervals.

What power and connection requirements should I know before use?

The 450P-RV runs from a 12-volt vehicle battery and must be connected directly to the battery with the engine running for optimal performance. This ensures stable voltage to support extended inflation cycles and prevents battery drain during long fills.

• Operates on 12V vehicle electrical system—connect directly to battery posts.
• Engine should be running during use for consistent voltage and performance.
• Designed for up to one hour continuous operation before a rest period.

What accessories are included and how does the kit support portability?

The compressor ships with a close-ended gas station style inflation gun and a deluxe heavy-duty carry bag to keep components organized and protected. The compact kit fits in RV compartments, truck beds or garage shelves so it’s always accessible for travel, roadside emergencies or routine maintenance.

• Gas-station style inflation gun for controlled filling and pressure checks.
• Deluxe carry bag for storage and easy transport.
• All fittings and hoses store neatly for quick access on the road.

Who is this for: The VIAIR 450P-RV is aimed at RV owners, truck drivers, overlanders and anyone who needs reliable, portable inflation for large tires. If you regularly service Class A motorhomes, trailers or heavy vehicles and want an automatic, high-pressure inflator that’s travel-ready and built for extended duty, this kit is designed to make roadside and campsite tire care faster and less stressful.