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-   -   Viair compressors (https://www.irv2.com/forums/f278/viair-compressors-536049.html)

pasdad1 05-15-2021 12:18 PM

Quote:

Originally Posted by MSHappyCampers (Post 5752297)
The 450P-RV has 100% duty cycle. The 400P-RV is 33%! The 450 is definitely the way to go!



But the other piece of the puzzle is the 400 pumps air faster! They just slow down the 450 so it generates less heat.

I bought the 400P-RV as it airs up the big 22.5 tires faster ....I only spend 5 minutes or less per tire when I need to add air a couple of times per year.

RS ODonnell 05-15-2021 01:01 PM

We've got a Smittybilt 2781. We've had to use it several times and it's always worked flawlessly.

https://www.amazon.com/Smittybilt-27.../dp/B004K25GMG

rfg9585 05-15-2021 01:06 PM

I recently got a 400rv auto based on my conversation with support. I carry it in the back of my jeep so I can also air it back up are hitting the trails. When\if you get one check the air gauge for accuracy, mind is a bit off, eg, 10 psi, so if I want to fill correctly now I know the adjustment.

rarebear.nm 05-15-2021 01:39 PM

Quote:

Originally Posted by Cruzer (Post 5752116)
It gets tough to air up steer tires to 120 PSI but I have a multiple of options. I installed the Pressure Booster as mentioned in an early post. That will allow pressures to increase up to double if needed. That lets me use my coach air to easily fill the tires with minimal time. It also gives me oil and moisture free dry air because the coach's air dryer filters the air.

For those times when I don't want to run the coach I use a Viair 450 12 volt compressor. But I mounted it in the compartment rather than go with the alligator clips. It's controlled by a solenoid coil that I control from a dash mounted illuminated mini rocker switch. There is a pressure cutout switch so I can actually leave it on for hours if need be to ensure that my air tanks stay full when using the Hadley air leveling rather than the Equalizer jacks. I can also top off the tanks prior to departing in the morning without having to run the big diesel and wake up the neighbors. This setup also saves me the room of storing a larger pancake portable compressor.

In your picture at the top right what kind of pipe is that fitting attached to?

Is that a dryer and filter mounted on the vertical support?

For our 5th wheeler I installed a CO2 system some years back and love that to inflate and run power tools. I have the output regulated to 150 PSI so I can inflate any typical tire in short time and run power tools as desired. For the MH I just use a Viair 450 compressor unit. I installed a 20 amp 12 volt power outlet on both driver and passenger sides of the coach so I can easily plug it any time needed. The CO2 system is much faster at inflating than is the Viair 450.

Cruzer 05-15-2021 01:45 PM

ARB also makes some great compressors. For any Jeep owners out there who want to air down for off-road and then air up when back on the pavement you can get some mounting kits from Innovative AT Products. I bought the ARB CKMTA-12 twin pump unit, which is a powerful unit. I mounted one underneath the passenger seat on our JLUR Wrangler and another beneath the passenger seat on our Gladiator. It's total out of the way and comes with a very well done mounting kit, wiring, etc. For fellow Jeepers this is a great way to have on-board air without taking up any room. This compressor by itself could also be used for a motorhome if you want to upgrade beyond the Viair units. I also have an ARB CKMP12 portable kit in tool box that I kept in out older JK Wrangler but no longer use, which would be another excellent choice for an RV owner.

https://innovativeatproducts.com/sho...-package-deal/

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Cruzer 05-15-2021 01:51 PM

Quote:

Originally Posted by rarebear.nm (Post 5752394)
In your picture at the top right what kind of pipe is that fitting attached to?

Is that a dryer and filter mounted on the vertical support?

For our 5th wheeler I installed a CO2 system some years back and love that to inflate and run power tools. I have the output regulated to 150 PSI so I can inflate any typical tire in short time and run power tools as desired. For the MH I just use a Viair 450 compressor unit. I installed a 20 amp 12 volt power outlet on both driver and passenger sides of the coach so I can easily plug it any time needed. The CO2 system is much faster at inflating than is the Viair 450.

The fitting on the top with the red air line is a quick-disconnect fitting (one of three in the basement) for the coach's auxiliary air connections. I removed the quick disconnect coupler and installed the tee. The Viair can backfeed the coach air tanks through this tee. That's assuming the brass petcock isn't closed, which I added in the event that there was a failure in the air hose.

The device in the middle is the SMS air transformer, aka air doubler, which boosts the output pressure from the coach's air supply and allows me to quickly fill those last few pound by boosting the output air pressure up to 150 PSI.

There is no air dryer or filter on the Viair supply of air, only with the coach's on-board air, which runs through the doubler.

Nowabeachbum 05-15-2021 02:46 PM

Quote:

Originally Posted by Cruzer (Post 5752116)
It gets tough to air up steer tires to 120 PSI but I have a multiple of options. I installed the Pressure Booster as mentioned in an early post. That will allow pressures to increase up to double if needed. That lets me use my coach air to easily fill the tires with minimal time. It also gives me oil and moisture free dry air because the coach's air dryer filters the air.



For those times when I don't want to run the coach I use a Viair 450 12 volt compressor. But I mounted it in the compartment rather than go with the alligator clips. It's controlled by a solenoid coil that I control from a dash mounted illuminated mini rocker switch. There is a pressure cutout switch so I can actually leave it on for hours if need be to ensure that my air tanks stay full when using the Hadley air leveling rather than the Equalizer jacks. I can also top off the tanks prior to departing in the morning without having to run the big diesel and wake up the neighbors. This setup also saves me the room of storing a larger pancake portable compressor.



For those that have a pre 2019 Cornerstone, you should pay attention to this mod. I was very limited in how I used my air self leveling since no Cornerstone pre 2019 has a compressor! There is a big difference between how I used air level between 2017, 18 and 2019! To me, the side benefit would be, you can air up tires. Its more important to be able to air level! Why Entegra didnt put a compressor in from the start is beyond me. JMHO but this is a great mod that makes those pre 2019 Cornerstones much better.

garysfb 05-16-2021 06:50 AM

Quote:

Originally Posted by GeezerViz (Post 5750756)
Ackkk... That is not a good idea. At least based on what I was told. I used to do that too untill I went to the Spartan Academy and both Big Mike and PJ said never, never, never, hook anything up to those posts. They are attached to your something or other main control module and if you hook up to it, you can short circuit that unit which is a multi thousand dollar repair. The newer coach's now have those posts hidden so no one will hook up to them. So I just use the chassis battery without the coach running and have been fine.

I guess sometimes we get conflicting information. I was at the class this week and, yes you better not use those posts for CHARGING your batteries; but they are perfectly fine for using with a Viair or other 12 volt tool. I asked that specific question when the presentation was given.

bevandtomH 05-16-2021 07:26 AM

I agree with Gary, safe to use the posts for the Viair per PJ.
No issues.
Anything else is a no no.

Terminex 05-20-2021 02:53 PM

+1 for the porter cable pancake.

only difference for me is the chuck. I install these on all of my inflators

Haltech chuck

lenny-shawna 05-20-2021 03:29 PM

Quote:

Originally Posted by Dr. Mike (Post 5747829)
Let me know where I can get one!

I tried mine out this weekend with the wand attachment and I let more air out than in!

While we are on the subject, I just discovered the coach air system this weekend. How do I use the system and what is the limit?

NAPA

Mle75749 05-20-2021 03:41 PM

YES....we love the VIAIR compressor
 
Quote:

Originally Posted by Bunkerhill (Post 5743975)
Does anyone carry a Viair compressor to assist in inflating steer tires to pressures higher than the coach air system can provide? If you do carry this type of compressor, do you find it adequate, rated at 150psi, to fill steer tires to about 125 psi?
Thanks

YES...we just bought one after reading about them on camping newsletter. We have had issues with tire pressure on our 40 Diesel Dutchstar and it worked GREAT. We store it under the bed. Weve had to have roadside before to air up tires so the money spent on the convenience this provides is well worth it!
We bought ours off Amazon.:dance:

Maggiedad 05-20-2021 03:42 PM

120-125 pounds in steer tires? My Michelin guide says 95 pounds at my loaded axle weight. I run 100 just to be safe. Can't imagine what the ride would be like at 125 pounds.

levans1788 05-20-2021 03:55 PM

Awesome tool. Works great. Wish Id found it sooner. Well worth the cost.


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