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02-15-2018, 12:14 PM
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#1
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Member
Join Date: Nov 2017
Posts: 77
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Viair portable compressor
I am considering purchasing a Virair 400p-rv compressor for the MH and was wondering if any of you had one and if so your thoughts.
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John & Belinda
2004 Newmar Mountain Aire
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02-15-2018, 12:18 PM
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#2
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Senior Member
Join Date: Jun 2012
Location: AB
Posts: 7,587
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Quote:
Originally Posted by TexAg
I am considering purchasing a Virair 400p-rv compressor for the MH and was wondering if any of you had one and if so your thoughts.
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The Viair has a good reputation but if I were buying, I'd spend the extra couple bucks and get the 450P for its 100% duty cycle.
The VIAIR 450P Automatic Function Portable Air Compressor is the only 100-percent duty cycle portable compressor on the market, and can run for extended periods of time depending on your environment. Its automatic pressure regulation system is designed to maintain an internal tank pressure of 145 PSI by cycling power to the compressor motor. This compressor is also equipped with a detachable gas-station-style inflation gun, which allows you to easily fill tires with a simple squeeze of the handle. This inflation gun can also show current tire pressure, so you don't need an additional pressure gauge.
400P Spec.
Powered direct to the car battery with alligator clamps, Duty Cycle: 33 percent @ 100 PSI Max. Working Pressure: 150 PSI Max. Amp Draw: 30 Amps Tire Inflation Gun with 130 PSI Inline Gauge
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2019 Unity LTV CB, pushed by a 2013 Honda CRV, BlueOx Baseplate, Aventa Bar & Patriot Brake
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02-15-2018, 01:03 PM
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#3
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Senior Member
Join Date: Jan 2017
Posts: 7,494
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Quote:
Originally Posted by TexAg
I am considering purchasing a Virair 400p-rv compressor for the MH and was wondering if any of you had one and if so your thoughts.
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I have the 400. Its perfect for my 19.5 tires
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2008 Phoenix Cruiser 3100
2012 Jeep Wrangler Sahara JKU.
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02-15-2018, 01:43 PM
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#4
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Senior Member
Entegra Owners Club
Join Date: Jun 2017
Posts: 130
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I agree with Dennis. I have the 450 and it is great! A little expensive but worth it for what it does.
https://www.gosale.com/5849124/viair...SAAEgJUufD_BwE
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2017 Entegra Cornerstone 45B with Retrobands on the front
2017 Jeep Cherokee Trailhawk Totaled
2019 Ford F150 (Thanks Tadd)
"If you ain't the lead dog, the view never changes".
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02-15-2018, 02:03 PM
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#5
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Senior Member
Monaco Owners Club Holiday Rambler Owners Club
Join Date: Nov 2016
Location: The Villages, FL
Posts: 138
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I have the 400p-RV works great on my 22.5 tires.
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2008 Holiday Rambler Ambassador 40SKQ
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02-15-2018, 03:10 PM
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#6
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Senior Member/RVM #90
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 54,785
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Quote:
Originally Posted by dennis45
The Viair has a good reputation but if I were buying, I'd spend the extra couple bucks and get the 450P for its 100% duty cycle.
The VIAIR 450P Automatic Function Portable Air Compressor is the only 100-percent duty cycle portable compressor on the market, and can run for extended periods of time depending on your environment. Its automatic pressure regulation system is designed to maintain an internal tank pressure of 145 PSI by cycling power to the compressor motor. This compressor is also equipped with a detachable gas-station-style inflation gun, which allows you to easily fill tires with a simple squeeze of the handle. This inflation gun can also show current tire pressure, so you don't need an additional pressure gauge.
400P Spec.
Powered direct to the car battery with alligator clamps, Duty Cycle: 33 percent @ 100 PSI Max. Working Pressure: 150 PSI Max. Amp Draw: 30 Amps Tire Inflation Gun with 130 PSI Inline Gauge
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YUP!  
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Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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02-15-2018, 07:14 PM
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#7
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Member
Join Date: Nov 2017
Posts: 77
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I don't really know what duty cycle means but according to Viair web site the 400 has a faster fill time than the 450. Why would I not want the one with the faster fill time?
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John & Belinda
2004 Newmar Mountain Aire
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02-15-2018, 07:45 PM
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#8
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Senior Member
Join Date: Jan 2017
Location: "Murvul", TN
Posts: 1,665
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Quote:
Originally Posted by TexAg
I don't really know what duty cycle means but according to Viair web site the 400 has a faster fill time than the 450. Why would I not want the one with the faster fill time?
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Duty cycle is the amount of time that the air compressor can run under a load before it needs to be shut off and allowed to cool. Usually, but not always, the time period for example might be 15 minutes on, 15 minutes off.....in other words it's not rated for continuous duty.....constant run time under a load.
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2016 F350 Crew Cab Dually Diesel King Ranch 4x4
2018 Grand Design Momentum 394M Toy Hauler
Excessive Payload Capacity is a Wonderful Thing!
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02-15-2018, 07:54 PM
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#9
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Senior Member
Join Date: May 2013
Posts: 122
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i use a 400. when i air the jeep tires down to 15lbs it runs all four up to 35 for the trip home- will pump up a 285/22.5 from 100lbs to 115 in reasonably short time. have used it quite a lot on rzrs and dune buggys [low pressure, lots of volume] .i've never have it shut off due to the duty cycle - or any other reason. if it dies, i'll go get another one just like it
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2008 40' Beaver Contessa
Fulltime RVers with toys.
Sandcar, Razor, and a Jeep. Where we play is where we sleep.
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02-16-2018, 04:08 PM
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#10
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Senior Member
Fleetwood Owners Club American Coach Owners Club
Join Date: Mar 2011
Posts: 6,768
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I've had several 12 volt compressors, none much good. Never used a Viair, but for lots less money, you can get a Porter-Cable 6 gallon 150 PSI AC powered compressor...$99.00.
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2014 American Eagle 45T
DD 13, 500 HP
Pulling a Honda CRV
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02-16-2018, 04:25 PM
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#11
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Senior Member
Join Date: Jan 2015
Location: Oroville, CA
Posts: 3,133
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The Via Aire units are deluxe; The duty cycle means how long is the run time-i.e. 50% duty cycle is x min on, then x min off. The 450 has a 100% duty cycle-you can just let it run, is my understanding.
I'm with the Catman on this. My pancake fills tires in seconds, not minutes, and I can buy three of them for the price of one Viair! But the ViAir are nice!
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Bill, Kathi and Zorro; '05 Beaver Patriot Thunder
2012 Sunnybrook Harmony 21FBS (SQEZINN)
2007 Jeep Grand Cherokee Overland
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02-16-2018, 04:53 PM
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#12
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Senior Member
Join Date: Sep 2012
Location: Tarpon Springs, Fl.
Posts: 1,540
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Quote:
Originally Posted by TexAg
I don't really know what duty cycle means but according to Viair web site the 400 has a faster fill time than the 450. Why would I not want the one with the faster fill time?
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It really depends on how much air you are going to need.
The 400 will faster and harder for a shorter period of time.
The 450 is slower, will be some what quieter, stay cooler and run approximately 3 time longer. est. 10 minutes vs. 30
I call Viair before I bought my 450 and they were quite
willing to explain the difference. We probably don'T need the 450 but it is nice to have simply because it works longer without shutting off to recover.
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2013 Newmar Ventana 3434 (sold)
2018 Wrangler JLU Rubicon (sold)
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02-17-2018, 07:50 AM
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#13
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Senior Member
Join Date: Dec 2016
Posts: 466
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I went with the 300p.
Smaller, lighter and less expensive.
Only carry for emergency flat and figure I can live with the 33% duty cycle.
Haven't tried it yet.
Have a larger tank compressor at home for maintenance.
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2015 Pleasure-Way Plateau XL Wide Body
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02-17-2018, 08:32 AM
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#14
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Senior Member
Join Date: Jul 2017
Location: Helena, Montana
Posts: 258
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Quote:
Originally Posted by TexAg
I am considering purchasing a Virair 400p-rv compressor for the MH and was wondering if any of you had one and if so your thoughts.
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I just bought the Vlair 400P last week, John, after scratching my head on what to get. The 400P worked fantastic. I got it mainly to top up my front 315 tires to 125psi. My on-board air only gets to about 110. Purchased the 400P for $166 on Amazon and got it in 2 days. Took about 5 minutes to go from 110psi to 125psi. Comes with nice carry bag. Note though, I did not get the 400P-RV, which comes with an extra length hose and a few more attachments. I really didn't need these attachments so saved a few $ with the 400P.
P.S.: Some folks on the forum have installed an air pressure "doubler" that increase your onboard air pressure. Takes some air piping work. Might want to do a search and find that if you're interested.
Good luck!
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Mike & Gaye + 2 spoiled Cockers: Daisy & Ellie
2020 Sunseeker 2400WB
Mercedes Benz Chassis Diesel
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