SKU: 78706263439

VIAIR 400P Automatic Air Compressor

Sale price$13824.00 Regular price$15360.00
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Ships within 48 hours · Estimated delivery Aug 14 - Aug 19

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Description

VIAIR 400P Automatic Air CompressorVIAIR 400P Automatic Air Compressor 400P Automatic is VIAIRs first Automatic shut off function portable compressor. This 33% duty cycle unit is capable of pressures up to 150 PSI and can be operated for up to 40 minutes at a time before needing to be rested (at up to 40 PSI). The 400P Automatic comes with a close ended gas station style air gun for added convenience. Portable compressors with automatic shut off come into play when moving from tire to

VIAIR 400P Automatic Air Compressor

400P-Automatic is VIAIR’s first Automatic shut-off function portable compressor. This 33% duty cycle unit is capable of pressures up to 150 PSI and can be operated for up to 40 minutes at a time before needing to be rested (at up to 40 PSI). The 400P-Automatic comes with a close-ended gas station-style air gun for added convenience.

Portable compressors with automatic shut-off come into play when moving from tire to tire, and when checking tire pressure in the middle of a tire fill. A typical portable compressor must be turned off between tire fills, and anytime you want to check tire pressure. If you aren’t near the compressor, this can turn into running laps back and forth to the portable compressor to turn the unit on and off. Automatic portables do not work in this fashion and will save you time & effort to get tires inflated quickly.

 

FEATURES
– Gas Station-Style Tire Inflation Gun with 160 PSI Gauge
– Automatic Shut-Off Function
– Quick Connect Air Hose with Heat Shield
– Vibration-Resistant Diamond-Plate Sand Tray
– Deluxe Dual Compartment Carry Bag
– 40-amp Inline Fuse Holder
– Dual Battery Clamps
 – 3 pc. Inflation Tips Kit
SPECIFICATIONS
– 12-Volt
– Permanent Magnetic Motor
– Duty Cycle: 33% @ 100 PSI
– Max. Working Pressure: 150 PSI
– Max. Amp Draw: 30 Amps
– Ingress Protection Rating: IP54
– Dimensions: 10.87″L x 5.83″W x 7.48″H
– Net Weight: 10.70 lbs.
– Power Cord Length: 8 ft.

– Air Hose Length: 30 ft.

 


FILL RATES

31″ X 10.5″ FILL RATE
0 to 30 PSI 3 min. 00 sec. (± 10 sec.)
15 to 30 PSI 1 min. 35 sec. (± 05 sec.)
33″ X 12.5″ FILL RATE
0 to 30 PSI 4 min. 20 sec. (± 10 sec.)
15 to 30 PSI 2 min. 05 sec. (± 05 sec.)
35″ X 12.5″ FILL RATE
0 to 30 PSI 5 min. 20 sec. (± 15 sec.)
15 to 30 PSI 2 min. 45 sec. (± 10 sec.)

              Shipping Notes
              • Free Standard Shipping on $100+ Orders to the USA.
              • Except Preorder products are shipped in 48 hours.
              • Delivery to the USA:
              1. Standard Shipping : 3-10 business days
              • If time is of the essence, please consider selecting expedited delivery for faster service.
              Exchange/Return Notes
              • We offer a 30-day return/exchange service after receiving.
              • Final sale items are not eligible for returns or exchanges.
              • To process your return/exchange, please contact us at [email protected]
              • Please click here for more details>>> Return & Exchange Policy
              SKU: 78706263439

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              4.2 ★★★★★
              Based on 24 reviews
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              Product Reviews
              J
              Verified Purchase
              Jack
              Charlottesville, US
              ★★★★★ 5
              Excellent Performance and Very Easy to Change Filter
              Style: Medium Room Air Purifier
              Very happy with this air purifier! It works really well and you can actually feel the air getting cleaner after running it for a while. It’s quiet, simple to use, and perfect for a medium-sized room. What I especially love is how easy it is to replace the filter. No complicated steps — just open, swap, and done in minutes. Super convenient and stress-free. For the price, the quality is surprisingly good. Definitely worth it, and I would buy again.
              WAS THIS REVIEW HELPFUL?YesReportShare
              Reviewed in the United States on March 1, 2026
              N
              Verified Purchase
              Nobu
              Grantham, US
              ★★★★★ 5
              great solid product for the price, easy to use
              Style: Medium Room Air Purifier
              Bought for a family member to put in his room & it’s been super easy to set up and use. Helps noticeably freshen up the room and keep it smelling better too
              WAS THIS REVIEW HELPFUL?YesReportShare
              Reviewed in the United States on April 30, 2026
              K
              Verified Purchase
              Kaleigh A
              Chelsea, US
              ★★★★★ 3
              Works as intended, but is badly designed
              Style: Medium Room Air Purifier
              This air purifier is great so far. I've only had it set up for about a day, but it seems to me that the air is cleaner so far. I got it for my office, mostly to make sure that there's less dust in the air because my allergies have been going crazy recently. The downside of this product is that the manual is just completely wrong. Both the manual + the box say to turn the bottom lid counterclockwise to open. However, I tried that and literally could not open it for the life of me. When I looked closer, I saw that there were pins holding the lid in place, and that the only place they could move was to the right - which meant turning the lid clockwise, not counter-clockwise. That wasted 15 minutes of my time trying to figure out, because clockwise didn't work either until I wiggled it. Likely the plastic surrounding the air filter was caught in the lid. Like another reviewer mentioned, the bottom lid where the filter goes doesn't really stay on tight, which is annoying. It took me a few tries to be able to put it down without the lid coming loose and the filter falling out. It's light in weight but very loud, at least when it comes to being on high (full blast). Medium is tolerable, low is preferable for whenever I'm meeting with a client. Sometimes I even turn it all the way off. It was maybe worth the price? We'll see if it helps my allergies.
              WAS THIS REVIEW HELPFUL?YesReportShare
              Reviewed in the United States on January 21, 2026
              R
              Verified Purchase
              Richard G
              Louisville, US
              ★★★★★ 5
              Very strong magnets on both sides.
              Size: 12inch
              You will want several. I use mine attached to the side of my large metal toolbox to make my frequently used tools easily accessible. But once connected to a large metal surface, it is very difficult to reposition which is a good thing. One surprise though, narrow shafted screws drivers don’t attach very strongly unlike other heavier tools with larger steel mounting areas for attachment. I am purchasing more for other areas in my workshop.
              WAS THIS REVIEW HELPFUL?YesReportShare
              Reviewed in the United States on April 21, 2026
              A
              Verified Purchase
              Amazon Customer
              Carnegie, US
              ★★★★★ 5
              good magnets
              Size: 12inch
              very strong magnets. they work well
              WAS THIS REVIEW HELPFUL?YesReportShare
              Reviewed in the United States on May 9, 2026

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