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From the manufacturer
VIAIR Corporation
VIAIR offers the most comprehensive line of fractional horsepower DC oil-less air compressors and air accessories for on-road, off-road, and industrial markets. Since 1998 our quality engineered compressors have become the industry standard for automotive aftermarket applications worldwide.
Heavy Duty Compressors for Tire Inflation
VIAIR 300p-450p
VIAIR's heavy duty portable tire inflators can be used on any vehicle with a 12v battery source and are designed for tires ranging from 33" to 42" diameter.
These compressors are suitable for both on-road and off-road vehicles.
VIAIR’s Automatic Tire Inflatiors make tire filling simple! While most portable air compressors must be turned off between tire fills and checking tire pressure, the Automatic compressors only operate while the trigger on the inflation gun is pulled. This will certainly save you much needed time, making the overall process of filling your tires seem effortless.
For those in the off-road segment, airing down tires allows for better traction while off-roading. Once your tires need to get back to their normal pressures, you simply hook the compressor up to your battery, and fill them to the recommended on-road pressure your vehicle suggests.
For those in the on-road segment, proper tire inflation is very important because it helps keep your tires lasting longer, it's better for gas mileage, and overall makes for a better ride while keeping you safe on the road.
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| VIAIR 300P | VIAIR 400P | VIAIR 400P-Auto | VIAIR 440P | VIAIR 450P-Auto | |
| Max Pressure | 150 PSI | 150 PSI | 150 PSI | 150 PSI | 150 PSI |
| Duty Cycle | 33% at 100 PSI | 33% at 100 PSI | 33% at 100 PSI | 33% at 100 PSI | 100% at 100 PSI |
| CFM Output | 2.3 CFM | 2.3 CFM | 2.3 CFM | 3.0 CFM | 1.8 CFM |
| Max Tire Recommended Tire Size | 33" | 35" | 35" | 37" | 42" |
| Automatic? | ✓ | ✓ | |||
| Max Amp Draw | 30 Amps | 30 Amps | 30 Amps | 44 Amps | 23 Amps |
Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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