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

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

Item # SM99666
Our Price: $86.45
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Shipping Weight: 0.44 lbs
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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 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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  • Reviews (286)
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  • Videos (3)
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Demco Accessories and Parts - SM99666

  • Tow Bar Braking Systems
  • Air Lines
  • Jumper
  • Demco

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


  • 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


  • 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

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

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Demco SBS Air Force One Supplemental Braking System Replacement Air Jumper Installation

Hello, everybody, Clayton here at Today, we're going to be working on our 2020 Ford Expedition. We're going to be taking a look at the replacement air jumper line by Demco. This replacement line is going to work well for you, if your motor home has a larger fitting, than your Air Force One fitting on your vehicle. So in our case we do have a quarter inch fitting on our towed vehicle. We have a half-inch fitting for our motor home.

Now, getting this installed is going to be super easy. You simply just push on to the fittings. I always like to pull on them a little bit after to make sure they're not going to go anywhere. Then we do have our airline here. It is coiled, and it's seven foot long.

With it being coiled, you don't have to worry about that dragging the ground and ruining your cord. But also it's going to stretch long enough to make that gap, whenever our tow bar is in lock position. We just want to take this. We just want to push our fitting into our motor home side and then move our collar up, locking it in place. That's pretty much going to do it for our look at the replacement air jumper line.

For your Demco Air Force One on our 2020 Ford Expedition..

Customer Satisfaction Score:

Customer Reviews

Replacement Air Jumper for Demco Air Force One Flat Tow Brake System - SM99666

Average Customer Rating:  4.9 out of 5 stars   (285 Customer Reviews)

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


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.


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.


The snap ring to keep it locked on the male fitting is weak. I have to really work to make sure it locks in place. It has come disconnected a few times.


Identical replacement of the original air hose.


Product deliver as promised. While traveling I ruined a jumper hose. Etrailer promptly shipped me the hose when ordered thus ensuring a prompt delivery. Thanks etrailer!!


I have an AirForce One braking system and my Demco Jumper got damaged to the point of being unusable. I called etrailer and got a wonderful operator (Diana) on a SUNDAY MORNING! Unfortunately, I was not sure of the exact jumper that was needed so Diana offered to call Demco and try to figure out MY needs. By Monday afternoon, Diana had spoken to Demco and directed me to the correct part. Then, since I was traveling, I needed the part sent to an address other than my home. Diana assured me this was not a problem. I also needed the part to arrive in THREE days and if it got there too late, I would no longer be there to pick it up. Once again, Diana did her very best to get me the jumper at my location where it was needed. The jumper worked great and it fit on my current system beautifully. Thanks Demco, etrailer, and most of all, thanks to Diana. The customer service at etrailer is incredible. Keep up the good work.


Great replacement article.


Fast efficent service.


Exactly what I needed. etrailer response has been the same for years, EXCELLENT!!


Works grear


Easy to order and got quick


GREAT! just great service and products and prices, shipping... all great!



Held up great, towed across the country wonderfully a few times. Will never go back to not having one.


Got it when I needed it


Exactly what i needed as a replacement. Works as expected.



As a full time RVer, it is a relief to know I can depend on the parts I buy from etrailer. The replacement air jumper for my Air Force One braking system has not failed.


Great Customer Service!


Order the item was very easy, and their delivery schedule was on time and where to meet and

Placing the order was very easy and their delivery time was scheduled perfect and they did a personal touch was very nice


I bought this as a spare, but now I use it all the time now because the original had to be threaded thru the safety cables but this coiled air jumper sits on top of the towbars - easier and quicker on the connect/disconnect.


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.



All great!


Called ordered and received as stated .
Great Customer Support


What a great customer service company. Every time I do business with you guys, it is such a pleasure.


You guys are quite simply the greatest I’ve run a multi million dollar company for several decades (service oriented) and if I knew how to motivate my staff as well as you guys do Jeff bezos would be my delivery driver thanks again Randy


Exactly like the one that came with our system. Prompt in mailing it for overnight, as requested. Thanks!


Thanks for shipping this item so quickly; I really needed it.


Works as advertised. No problems.


We were on the road and somehow lost our jumper air hose. Without it we had no towed brakes. Thanks for helping get the new part to our camp site and get us back on the road.


Thank you for getting me the right part! I will definitely be using
in the future! Thanks again to Will for guiding me to correct part.

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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:
David F
Employee Chris R
Video by:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Amanda K
Updated by:
Amanda K
Employee Clayton O
Test Fit:
Clayton O

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