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

The VIAIR 450P-RV is a 12V automatic portable air compressor that delivers up to 150 PSI and a 1.80 CFM flow rate to quickly inflate large RV and truck tires while the vehicle is running.

Built specifically for heavy-duty on-road use, the 450P-RV combines an automatic pressure-sensing cut-off with a close-ended, gas-station style inflation gun and a deluxe carry bag for easy storage. It’s designed to support tires up to 42 inches and offers continuous-duty capability at 100 PSI, making it a practical choice for RVers, truckers, and off-road enthusiasts who need a reliable 12V inflator on the road or at the campsite.

How does the automatic feature simplify inflating multiple large tires?

The built-in pressure sensor automatically cycles the compressor when the inflation gun is open, so you can move from one tire to the next without repeatedly switching the unit on and off. This reduces hands-on time and lets you check pressure mid-inflation for accuracy.

• Automatic pressure cut-off for hands-free operation
• Close-ended inflation gun provides controlled airflow and pressure checks
• Ideal for sequential tire-to-tire inflation on RVs and trucks

What performance can I expect for large RV and truck tires?

The compressor produces a maximum working pressure of 150 PSI and a free flow of 1.80 CFM, engineered to handle large tires up to 42". It operates from a 12V vehicle battery and delivers dependable inflation power while the engine is running.

• Up to 150 PSI maximum working pressure
• 1.80 CFM free-flow capacity for efficient filling
• Designed for tires up to 42 inches and continuous operation at 100 PSI

How long can the compressor run and what are the power requirements?

The VIAIR 450P-RV is a heavy-duty unit with a 100% duty cycle rating at 100 PSI and can operate up to about an hour before requiring a rest, depending on load and ambient temperature. For reliable performance, run the compressor while the vehicle’s engine is on and connect it directly to the 12V battery as instructed.

• 12-volt DC operation from vehicle battery
• 100% duty cycle at 100 PSI for extended use
• Recommended to use with engine running for continuous power

What accessories and storage options are included with the kit?

The kit ships with a close-ended gas station-style air gun that simplifies pressure checks and controlled filling. A heavy-duty carry bag keeps the compressor, hose, and fittings organized and ready for stowage in RV compartments, truck beds, or garages.

• Close-ended inflation gun for controlled airflow
• Durable carry bag for neat storage and transport
• Everything designed for roadside, campsite, and regular maintenance use

Who is this for: The VIAIR 450P-RV is aimed at RV owners, truck drivers, and off-road enthusiasts who need a robust, vehicle-powered inflator capable of handling large tires. If you frequently travel with heavy loads, tow trailers, or camp in remote areas, this automatic 12V compressor gives you a portable, ready-to-use inflation solution that minimizes downtime and keeps you prepared for tire maintenance and emergencies.