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Replacement Air Jumper for Demco Air Force One Flat Tow Brake System
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Demco

Replacement Air Jumper for Demco Air Force One Flat Tow Brake System

Part Number: SM99666
457 Reviews | 42 Questions
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$65.05
 Accessories and Parts

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Replace the coiled air jumper hose for your Demco Air Force One supplemental braking system. 1-800-940-8924 to order Demco accessories and parts part number SM99666 or order online at etrailer.com. Free expert support on all Demco products. Great prices and Fastest Shipping for Replacement Air Jumper for Demco Air Force One Flat Tow Brake System. Accessories and Parts reviews from real customers.
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Demco Accessories and Parts - SM99666

  • Flat Tow Brake System
  • Air Lines
  • Jumper
  • Demco

Replace the coiled air jumper hose for your Demco Air Force One supplemental braking system.


Features:

  • Replaces the air jumper for your Demco Air Force One braking system
    • Connects air assembly in RV to operating unit in towed car
  • Length when fully stretched: 7'
  • Fitting size: 1/8" male


Fits:

  • Demco Air Force One supplemental braking systems (SM99243, DM55MV, and DM26VR)
    • For 2019 and newer Spartan chassis, use kit SM6296
    • For Freightliner chassis with BrakeSync, use kit DM97ZR


6212 Replacement (Formerly SMI) Coiled Air Hose for Demco Air Force One Supplemental Braking System

Replaces Demco SBS SM88249 and SM99666







Customers Who Purchased This Accessories and Parts Also Bought...



Video of Replacement Air Jumper for Demco Air Force One Flat Tow Brake System
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Breaking Down the Replacement Air Jumper for Demco Air Force One Flat Tow Brake System

Today, we're taking a look at a replacement air jumper. Now, this replaces the air jumper for SMI Air Force One supplemental braking system, part number SM99202. This coiled air hose connects your air assembly in the RV to the operating unit on the towed vehicle. It has the quick connect ends that makes the unit easy to attach and detach. These ends are corrosion-resistant when it comes to the finishing, so it's gonna keep the quick connect safe from rust and corrosion. It is a direct replacement part, straight from the manufacturer, and it's blue in color when it comes to the hose, and the length when it's fully stretched out is around 7 feet long.

That's gonna do it for today's look at the replacement air jumper for the SMI Air Force One supplemental braking system, part number SM99202.

Customer Satisfaction Score:

Ratings & Reviews

4.9

457 reviews
5 Stars
(419)
4 Stars
(21)
3 Stars
(13)
2 Stars
(3)
1 Star
(1)
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by:
Brittany, the Customer Service rep that helped me was fantastic. Parts fit, shipping was right on time and it needed to be appreciate you.
by:
This is the second (or maybe third) time I have used eTrailer to help me sort out problems with my coach. I can't say enough as to how happy I am for their service, from start to finish. Kayleigh helped me sort through the parts and made sure I had the correct one for my make and model of coach. She set up delivery to my next KoA and even with express delivery, they did not charge an arm and a leg for that expedited shipping via UPS. Finally, I received an email trail of the process from start to finish and a follow up from Kayleigh that they showed it had been delivered. If you need parts and you are on the road, eTrailer is the way to go in my book.
by:
We ordered the wrong size Air Jumper the first time. They were on it - helped us find the correct size, shipped it out to our next campground, and emailed me a return authorization to drop off the incorrect one at the next UPS store we saw. Couldn’t be happier with these guys!
by:
It’s perfect. I tried unsuccessfully via Amazon and locally to replace my broken Air Force One line between my coach and Jeep. Got it right the first time from etrailer. The others gave a male end which didn’t fit.
by:
Etrailer is awesome. If you don’t know exactly what part you need, customer service always seems to know what you’re needing. Order lots of trailer parts and they are usually the cheapest and shipping is fast. Quality of parts is always good.
Bob profile picture

Bob

10/22/2025

It’s a perfect replacement for the one I damaged. Very good quality.

by:
Proper item received in a timely matter. Thank you etrailer!
by:
Just arrived so have not used it. It appears to be a direct replacement for my old damaged air hose. Once I get to use it and if it performs as expected i would then give it a 5.
David profile picture

David

12/8/2025

Hose has worked as advertised. Glad to have it.

Nick S. profile picture
Etrailer Expert

Nick S.

12/8/2025

@David That is great to hear! I am glad it has been working for you. What coach and vehicle are you flat towing?
by:
Exact same as original. Whole transaction excellent.
by:
Thanks it just what I need.
by:
Joanne K did an excellent job identifying the correct part I needed.
by:
Exactly what I needed and shipping was quick which I needed!
by:
I always go back to etrailer when I mess up a part or something breaks.
by:
Great job Jermey thank you for your assistance.
Mike L. profile picture
Etrailer Expert

Mike L.

2/11/2026

Thanks Richard, I'll pass your kind comment along to Jeremy!

by:
The Air Jumper for my Demco Air Force One tow system arrived on the date expected, and was in the OEM packaging from Demco. Very satisfied with the item and the service I received from Joshua B @ etrailer
by:
Fantastic parts and exactly as advertised. Thank you again, ETrailer
by:
On time delivery
by:
I just returned from a 3100 mile trip where my current air brake hose started leaking as the result of an earlier accident. i must have checked 15 retail shops and RV centers along the way for a replacement product, no one had a separate hose, only the full air force one system. i found your company online and was happy that the product arrived ahead of schedule and works perfectly.
Chuck profile picture

Chuck

9/28/2020

All great!

by:
Exact replacement for original hose
by:
Even though our coach has been in the shop for 9 months, our dedication to finding the very best products have always s been our primary goal. We have been rving for 14 years and have found your products to be just that.
Victoria H. profile picture
Etrailer Expert

Victoria H.

3/22/2025

I hope you're able to get back on the road soon Lenmar! We enjoy being your go-to for all your RVing needs and will be here for you anytime you need along your adventures!

by:
You were very helpful even though I did not receive the air hose the next day as requested.You said you would refund me the overnight shipping fee.Thank you.
by:
I always like to have spares on my essentials.
by:
Awesome customer service and projected date of delivery was exactly the date delivered.
by:
We needed this part to tow our car behind our motorhome. Etrailer said UPS could deliver it in 1 day so I paid extra for UPS and the next day it arrived.
by:
My RV mechanic shop couldn’t find a new air jumper. I looked it up on the internet and etrailer was the 1st website to be displayed. I received it in less than a week and it works perfectly.
Theodore B. profile picture

Theodore B.

1/18/2024

My RV shop couldnt get the air jumper. I found you guys on the internet and received the hose in 4 days. It still works great after one year.

by:
The product was an exact replica of the Blu-Ox air hose connection. Service from-trailer was excellent. The worked with me on shipping options and I received product while staying at a State Park in time for my travels on down the road.
Richard profile picture

Richard

6/25/2019

It broke. I think these air lines are not very resilient but that’s ok just bought another one fro RV Pats store.

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Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Laura H
Written by:
Laura H
Employee Dustin K
Video Edited:
Dustin K
Employee Cole B
Installed by:
Cole B
Employee David F
Installed by:
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Employee Chris R
Video by:
Chris R
Employee Wilson B
Updated by:
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Employee Kristina F
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Employee Amanda K
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Employee Clayton O
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Clayton O

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