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Replacement Quick Exhaust Valve for Roadmaster BrakeMaster or Even Brake Supplemental Braking System

Replacement Quick Exhaust Valve for Roadmaster BrakeMaster or Even Brake Supplemental Braking System

Item # RM-450601-50
Our Price: $65.99
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Shipping Weight: 0.18 lbs
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Replaces 1 quick exhaust valve for Roadmaster BrakeMaster or Even Brake supplemental braking systems. 1-800-940-8924 to order Roadmaster accessories and parts part number RM-450601-50 or order online at Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Replacement Quick Exhaust Valve for Roadmaster BrakeMaster or Even Brake Supplemental Braking System. Accessories and Parts reviews from real customers.
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  • Reviews (57)
  • Q & A (0)
  • Videos (2)
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Roadmaster Accessories and Parts - RM-450601-50

  • Tow Bar Braking Systems
  • Valves
  • Roadmaster

Replaces 1 quick exhaust valve for Roadmaster BrakeMaster or Even Brake supplemental braking systems.


  • Replaces a quick exhaust valve for Roadmaster supplemental braking systems
  • Works with:
    • BrakeMaster models 9000, RM-9060, RM-9100, and RM-9160
    • Even Brake model RM-9400
  • Includes 1 replacement valve

450601-50 Replacement Quick Exhaust Valve for Road Master Brake Master or Even Break SBS

Video of Replacement Quick Exhaust Valve for Roadmaster BrakeMaster or Even Brake Supplemental Braking System

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

Video Transcript for Roadmaster Supplemental Braking Systems Quick Exhaust Valve Replacement Review

Instructor Hi there, flat-towers. Today, we're gonna be taking a look at Roadmasters replacement pressure relief valve for the BrakeMaster and the Even Brake systems. We're gonna be showing it off today by replacing it on a damaged Even Brake. Regardless of which system you have the installation is going to be similar. Have you ever set up your Even Brake when you go to flat tow and you hit the test button and it doesn't actually apply the pedal, it just exhausts the air out. That's actually a very common problem on the Even Brake.

We do have replacement parts available here at etrailer so you can fix this. You're not alone at home. This is again, very common. And we're gonna show you how to fix it. The problem is the pressure relief valve located right here.

This is our replacement. It does look a little bit different but it is a direct replacement for that part. And the way that you can check to verify that this is the issue, you do wanna be careful, but if you hook this up and hit the test button like you we're checking out in your car, just do it out here. It normally will exhaust the air just like you saw a minute ago. But if you put your finger over the open hole here you can cover up where the air is exhausting from and it'll actually extend the pedal.

If it does, then you know that the relief valve here is the culprit, it's leaking out of the valve. Your thumb was just a stopper that temporarily made it work. So to get this removed we're gonna remove the two screws that we're located towards the front of the unit there. The ones here in the middle hold our pump and assembly on, these ones should stay with our bottom plate. And then we've got a couple here in the back.

We're gonna use a 5/32 Allen key to remove these. We also went ahead and unscrewed the handle. If you want to take the unit completely off the lid here you'll have to take these C clips off this and then you can slide the arm off here. It actually had the whole thing out but you don't need to take it all the way out. We just need to slide it out enough to access the valve here. So now that we've got access to our valve, for me to remove it, so we'll go ahead and remove the hose, just press it on the outer ring and then that'll just slide out of there And then we can thread off the entire unit. We may need to take the quick release valve out first before unthreading it, 'cause it kind of looks like when we go to unthread this it's gonna hit our cover here when we try to take that out. So we're just gonna go, cause we're gonna have to transfer this over to the new part anyway so we might as well just take it out now. We're just gonna use an adjustable wrench. It's gonna be easiest if you use an adjustable because this piece down here will just work better if you can just use a wrench that you can custom fit to its particular size. In a lot of cases, once you get it started you can unthread it the rest of the way by hand. Now we can unscrew the whole assembly here. And this is pretty similar, once you get it started you can usually take it the rest of the way off by hand. Really gonna put some thread sealant on the threads to make sure we don't have any air leaks. And then we're going to thread the bottom one in down here labeled A, right onto the actuator and then put more sealant on the quick-release end. And then we're gonna thread that in on there as well. We're gonna then just plug our air line back in. I always like to give it a tug to make sure that the quick release did grab and then we can reassemble our unit. Now that we've got our new valve in place and our box back together and reinstalled in the vehicle, we've gone ahead and plugged it all in, it pressurized and now we're gonna go ahead and hit the test button and verify proper operation. And we can see it applies our pedal and it releases, so it looks like everything's working properly. It is gonna do this two to three times. And if everything works successfully the light that was near the test will go green. If it goes red, then you'll need to readjust and set it back into place, as it found an error in its calibration. That's usually has to do with the adjustment in where your seat is. But since we're all green, we're ready to go. And it's also not uncommon for you to hear it to start back up and repressurize itself after the test. And that completes our look at a Roadmasters replacement pressure relief valve for the Even Brake and the BrakeMaster..

Customer Satisfaction Score:

Customer Reviews

Replacement Quick Exhaust Valve for Roadmaster BrakeMaster or Even Brake Supplemental Braking System - RM-450601-50

Average Customer Rating:  4.8 out of 5 stars   (57 Customer Reviews)

Replaces 1 quick exhaust valve for Roadmaster BrakeMaster or Even Brake supplemental braking systems.


Have not installed this yet but the info provided by etrailer is very detailed and should be pretty easy.As always shipping was very fast. Thanks.


Works like it is supposed to here in Sydney Australia


Excellent product! Did look exactly like the original but it fit and works perfectly.
Original piece is on the right it the first picture and installed in the second.
Although I had figured out what was wrong before finding your how to video it confirmed my diagnosis. Wish I had searched first.


Fits well and works well

Mildred - 04/22/2023


Quality replacement at a reasonable price. Shipped and received quickly. I recommend e-trailer for anything RV.

Still going strong.
Michael - 09/30/2022


Replacement part for the pneumatic cylinder on the in-car braking system (Brakemaster 9060). Easy to fit, took about 5 minutes.

Still works perfectly, the actual valve is a molded rubber that fits inside the aluminum housing. It had simply pershed over time.
Nick F - 08/29/2018


After finding the right location to install the valve it was an easy install. AND, it worked perfectly. Won't know for sure just how good until I get my car behind my motor home again in the spring.

Never did get it working right.
Edward F - 12/22/2021


My 2006 Roadmaster Even Brake had worked flawlessly for us until the current month-long trip we are on. Suddenly it started dumping all of its air whenever we pushed test and failed to move the brake pedal. I called Roadmaster to find if anyone could service this older unit. They said they no longer supported these older models but to their credit Roadmaster did offer a substantial price reduction to trade it for a new model. Pretty good customer service for a product purchased 15 years ago!

Somehow, I was lucky enough to find the etrailer replacement valve on a [online] search and decided to try this low-priced solution first before spending over $[xxx] on a new one. Boy am I glad I did! The valve shipped quickly (less than a week) to a forward stop on our Motorhome trip. I followed the clear instructions in etrailer's video and in about 10 minutes, with rudimentary tools, my even brake was reassembled and functioning like new! Great product, service, and price.


Great fast service and it was exactly the right part. I will gladly give it 5 Stars


Items received quickly and was able to install them in about 15 minutes.

The replacement valve continues to perform as designed after a year of use.
Richard - 11/19/2022


Haven’t actually used it yet. Will be using it in a couple of days. Excellent customer service, and got it when I needed it and it fits perfectly on my Brakemaster.
I have purchased from in the past. Their customer service and support is top notch.


Website was useful for diagnosing the Even Brake problem.
The video demonstrating how to install the park was very helpful.
The part arrived within a few days of placing the order.
Overall a very good experience, except for the price. But it was better than paying the manufacturer $500 plus shipping to recondition the entire Even Brake unit.


Item was delivered ahead of promised date and worked as expected.


Repeat etrailer customer: vast inventory, competitive pricing, easy ordering process, and rapid shipping & handling.... couldn't ask for any better service!


The replacement exhaust valve was exactly what I needed after reviewing the video it was clear what was wrong with my even brake the video also showed the repair which was very easy to follow and do


The part repaired my system. There was loud whooshing sound and the brake would apply. The bladder inside the part had failed. This was a direct fit, easy to install, and has worked perfectly.


Exact part I needed. Fast service also.


Fast delivery, the right part for my tow car brakes. It solved the air leak I had. Thanks


Works well


Easy install and so.bed the problem.


Right part. Delivered faster than expected. Ashley went out of her way and took time to ensure that I got the exact part that I needed. Great folks to do business with!


Exactly what I needed for a fix.

Unit is still going strong.
Dana F - 10/21/2021


I have not used it yet but got here very fast as said it would will give more up date when I put it to service


Terrible Service...! From the day I ordered to the day it was shipped.
I ordered it online on the 4th of July and it was shipped on the 12th of July.
Then it took another 4 days to arrive...


Right part ordered on 12/26 received on 12/31 how to install part video took all of 30 minutes to repair.

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Info for this part was:

Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Jeff D
Installed by:
Jeff D
Employee David F
Installed by:
David F
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Dustin K
Video Edited:
Dustin K

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