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Replacement Check Valve for Demco SBS Supplemental Braking Systems

Replacement Check Valve for Demco SBS Supplemental Braking Systems

Item # SM99909
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Replaces the check valve that came with your Demco SBS Air Force One (SM99202 or SM99243) or Stay-IN-Play Duo supplemental braking system (SM99251). Call 800-298-1624 to order Demco accessories and parts part number SM99909 or order online at etrailer.com. Free expert support on all Demco products. Guaranteed Lowest Price and Fastest Shipping for Replacement Check Valve for Demco SBS Supplemental Braking Systems. Accessories and Parts reviews from real customers.
  • All Info
  • Reviews (14)
  • Q & A (6)
  • Videos (1)
  • Photos
  • Why etrailer?

Demco Accessories and Parts - SM99909

  • Tow Bar Braking Systems
  • Hardware
  • Demco

Replaces the check valve that came with your Demco SBS Air Force One (SM99202 or SM99243) or Stay-IN-Play Duo supplemental braking system (SM99251).


Features:

  • Replaces the check valve that came with your Demco SBS supplemental braking system
    • Works with Air Force One (SM99202 or SM99243) and Stay-IN-Play Duo (SM99251)
  • Check valve installs between the brake booster and the towed car's engine
  • Required on all towed cars that don't have a diesel engine and aren't Hummers
  • Includes 1 replacement check valve


16126 Demco SBS - (Formerly SMI) Replacement Check Valve for Air Force One or Stay-IN-Play Duo Supplemental Proportional Braking System

Replaces Demco SBS SM15601 and SM99909





Video of Replacement Check Valve for Demco SBS Supplemental Braking Systems

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




Video Transcript for Review of Demco Replacement Demco Check Valve - SM99909

Michael: Hi there, I'm Michael with etrailer.com. Today, we're going to take a quick look at the Demco replacement check valve. This is going to replace the check valve that came with your Demco supplemental braking system, whether that be the air force one or the stay-in-play duo. It is going to be an exact replacement from Demco, so you can trust it's going to work for your application. You're not going to have to worry about a fit issues or compatibility problems or anything like that. This check valve is going to install between the brake booster and the towed vehicle's engine.

Just like the original, it is going to be required for all towed vehicles that don't have a diesel engine and are not Hummers. Like I said, this is an exact replacement from Demco, so you can trust it's going to work well, just like the original did. So for whatever reason, if your original has been lost or is no longer working, this is going to be the piece that you need. So that's going to complete our look for today. Again, I'm Michael with etrailer.com.

Thanks for watching.


Customer Reviews

Replacement Check Valve for Demco SBS Supplemental Braking Systems - SM99909

Average Customer Rating:  4.9 out of 5 stars   (14 Customer Reviews)

Replaces the check valve that came with your Demco SBS Air Force One (SM99202 or SM99243) or Stay-IN-Play Duo supplemental braking system (SM99251).

- SM99909
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Ordered this to have on hand in case it is needed. We had one go out on us & the manufacture replaced it under warranty. it is an easy fix if you have the part.



- SM99909
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etrailer does a very good job for us in all areas



- SM99909
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This product is exactly what I was looking for . Works as advertised. Prompt shipment



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- SM99909
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As advertised.



- SM99909
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- SM99909
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Came quickly and well priced


Comments
Perfect
Patrick C - 04/10/2020


- SM99909
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- SM99909
by:

Exactly what I needed. Bought a used Invisi-Brake and needed a 3/8 check valve for the master cylinder. This part is perfect. Fast shipping and a great price!!



- SM99909
by:

replaced a bad check valve after five y ears.



- SM99909
by:

Inexpensive item that should be replaced yearly for safety reasons.



- SM99909
by:

Fast, as ordered, pleasure to do business with.


14
14

Ask the Experts about this Demco Accessories and Parts

  • Installation of SMI Replacement Check Valve on 2019 Ford Ranger
    The Replacement Check Valve for SMI Supplemental Braking Systems # SM99909 on your 2019 Ford Ranger will install in the either of those two hoses according to my tech contact at Demco (who owns SMI). He said you will install it only in whichever line you install the T-Fitting. The rubber hose will be easier for sure so that is my recommendation and the black side of the check valve needs to be on the engine side. I've attached a photo from the instruction manual of the SMI Stay-IN-Play...
    view full answer...
    Image 1 for Image 2 for
  • What are the Dimensions of SMI replacement Check Valve # SM99909
    I measured the Replacement Check Valve for SMI Supplemental Braking Systems # SM99909 for you. The overall diameter at the barbs for each end is 0.42 inches. The more narrow parts at the base have a diameter of 0.37 inches. The center, widest section is 0.76 inches in diameter. The overall length is 1.66 inches. This valve was designed to work with the Air Force One SM99202 or # SM99243 and Stay-IN-Play Duo # SM99251. So if you have one of these systems this is the correct replacement. If...
    view full answer...
    Image 1 for
  • Check Valve for SMI Supplemental Braking System on 2003 Jaguar X-Type
    The Replacement Check Valve # SM99909 that you referenced is designed for use with the SMI Stay-IN-Play DUO Braking System # SM99251 or the Air Force One # SM99243 and is needed on your Jaguar if you are installing either of these systems. The valve will indeed fit your vehicle. I have attached a couple diagrams taken from the installation instructions for these braking systems that you can take a look at as well.
    view full answer...
    Image 1 for Image 2 for
  • Troubleshooting SMI Air Force One Braking System Triggering Check Engine Light on Toyota Corolla
    I reached out to my contact at SMI (now Demco) and he said that on your 2017 Toyota Corolla iM the exhaust port on the Air Force One # SM99243 operating unit does need to be left open. He said the issue in your case is that the vacuum check valve between the tee and operating unit has likely failed. You can simply replace this vacuum check valve with part # SM99909 and face the black portion of the valve towards the unit, making sure to unplug the exhaust port in the process. This...
    view full answer...
  • Recommended Replacement Components for SMI Air Force One on 2019 Ford Ranger
    You can use the 1/4" Air Line Hose - SMI Air Force One or Stay-In-Play Duo Supplemental Braking System # DM16114 sold in 1 foot increments, so if you need 6 feet of new hose you can simply select quantity 6 on that product page and you will receive one 6 foot section of hose. The compression fittings like the Replacement Female Push-On Hose Connector for SMI Air Force One Supplemental Braking System # SM99726, the Replacement 1/4" Female Pushlock Fitting for SMI Supplemental Braking...
    view full answer...
  • Demco SBS Air Force One Replacement Parts for Poor Vacuum on 2018 Jeep JK Rubicon
    The Demco SBS Air Pressure Stop Light Switch Kit for Towed Vehicles - Air Force One # SM99629 will have that fitting you are referencing. You will also want to check any fittings like the Replacement 1/4" Female Pushlock Fitting for Demco SBS Supplemental Braking Systems - Qty 1 # SM99611 or check valves # SM99909. If the controller is the issue then you will need the Demco SBS Second Vehicle Kit for Air Force One Supplemental Braking System # SM99209. The controller is not available...
    view full answer...

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Info for this part was:

Employee Michael H
Expert Research:
Michael H
Employee Sarah W
Written by:
Sarah W
Employee Kristina F
Updated by:
Kristina F
Employee Michael B
Installed by:
Michael B

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