VIAIR 400P RV Air Compressor
The Unboxing and Review of the VIAIR 400P RV Air Compressor:
You may wonder why we are looking at purchasing an air compressor when our rig already has one built-in. There are a couple of reasons why we decided to buy the VIAIR 400P Air Compressor. First when we use the Journey’s built-in air compressor the diesel engine is running while we go from tire to tire checking and airing them up. Our neighbors probably don’t appreciate this early in the morning or late at night and it’s even a little irritating to us. Secondly this air compressor actually can air up a tire from zero to 100+ pounds of pressure. The tire just has to have a good seal! Built-in air compressors often can’t fill up a tire from zero to over 100 pounds pressure.
Now, let’s be truthful here. The manual does state that you hook up the VIAIR to your vehicle’s battery and use it while the vehicle is running so the batteries won’t run down. However our toad (Honda Pilot) can fill this need and is a lot quieter than the Journey’s diesel engines. In some cases you can run this off the chassis battery while when connected to shore power depending on your setup. As a backup you can also connect it to the chassis battery and use it while running the diesel engine. It has more “oomph” than our built-in air compressor if the air pressure is really low. Also it’s compact. There is no tank and as you can see in the video it’s small.
What’s in the box?
- Convenient canvas bag with pockets and handles
- VIAIR Air Compressor with battery connectors
- Tire Pressure Inflator
- Tire Pressure Gauge
- Air Inlet cover & Filters
- 2 air hoses
Easy-connect hoses make it quick to connect the hoses once you figure out how they connect ;-).
- Connect the RED VIAIR clamp to the positive (RED) connection of your battery
- Connect the BLACK VIAIR clamp to the (BLACK) negative connection of your battery
- Connect the two air hoses to the air compressor
- Connect the air gauge to the air inflater
- Connect the air inflater/gauge to the hose
- Use the built-in (big) gauge to read the pressure & inflate (note the air gauge goes to zero if you remove it from the wheel’s stem)
- Optional – double-check the inflation using a digital (recommended) or analog gauge
Hope you enjoyed this review,
The following review(s) were not paid for by Viair or Viair Dealers to say positive things about Viair products. Our goal is to share with you, the viewer, honest and unbiased Viair product reviews to show what to expect when you purchase a VIAIR brand compressor.