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Freep's avatar
Freep
Explorer
Sep 03, 2018

Air Compressor decision

I'm having trouble deciding which of these two compressors I should get. I'm certain it will be one of the two but I need some input from some of you.


The viAir 400P-RV pumps faster but has a shorter duty cycle

the viAIR 450P-RV pumps slower but has a longer duty cycle.


My fronts run at 80 PSI cold and the rear at 65 PSI cold.

Comments?

19 Replies

  • Unless 12 volts is important the pancake compressor is better , it will be faster plus can be used for may other things , lug wrench , air nailer ,air over hydraulic jack. Mine will run on a one K invertor.
  • Unless 12 volts is important the pancake compressor is better , it will be faster plus can be used for may other things , lug wrench , air nailer ,air over hydraulic jack. Mine will run on a one K invertor.
  • I just bought a Milwaukee M12 inflator. Great little inflator. Perfect for "topping off" tires and blowing up inflatable toy. Max pressure is 120 PSI. For large tires (like Class A's) it would take a long time to fill a completely flat tire. Likely 3 or more batteries (M12 lithium ion).

    The best feature is, just screw it on (brass Schrader valve adapter), set the pressure on the digital gauge and press start. As I said, you had better have 1 or 2 spare batteries and a way of recharging them when you are on the road.

    TIP : You need to make your own adapter to fill large inflatable toys. But a 3" grass tire valve (cheap on eBay). cut off the end where it would normally attach to the rim. Deburr inside and out. Mini blow gun !
  • Not knocking either one, but I bought a small inflator from Lowes that seems to work well for my Truck.


    https://www.lowes.com/pd/Kobalt-12-Volt-120-Volt-Car-Air-Inflator/1000092575

    Quicker and quieter than my last one, works on either 120 VAC (faster) or 12 VDC, and can be set for a given pressure and will shut off.
  • I have enough extra basement storage space in our Winnebago Vista I bought a 110 volt AC "pancake" compressor rated at 150 lbs. Harbor freight, Walmart, Home Depot, Lowes and more sell them for about $100. I have to fire up the generator but I can top off a tire in about 30 seconds with it. If you have a genny and the room, sure is a lot more bang for the buck. In my case, I was able to screw it down and get a long enough hose I could reach all the tires. Got tired of dragging it out and using an extension cord.
  • I don’t have either one, but a longer duty cycle usually means more solid electronics. Will it matter ... who knows.
  • I have the 300P and R18 80psi tires. I like the fill (i.e. top-off) rate, but it gets darn toasty hot when I top off 4 tires back to back. The 300P is vastly superior to all the jumper/pumper boxes I've owned, but I worry the 33% duty cycle is marginal.

    --SiletzSpey
  • Assuming you need it for backup use in RV, I don't think cfm or duty cycle is crucial for the use.
    23 amp v/s 30 amp can be.