Demco Hydraulic Brake Line Kit for Single Axle Trailers - Drum Brakes

Demco Hydraulic Brake Line Kit for Single Axle Trailers - Drum Brakes

Item # DM5426

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Accessories and Parts DM5426 - Brake Lines - Demco
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Designed for single-axle trailers, this hydraulic brake line kit includes a 16' steel line, a 17" steel line, a 6-1/2' steel line, an 18-7/8" flexible hose, a 3/16" tee, and hardware required for affixing lines to your trailer. Call 800-298-8924 to order Demco accessories and parts part number DM5426 or order online at Free expert support on all Demco products. Guaranteed Lowest Price and Fastest Shipping for Demco Hydraulic Brake Line Kit for Single Axle Trailers - Drum Brakes. Accessories and Parts reviews from real customers.
  • All Info
  • Reviews (12)
  • Q & A (4)
  • Videos (2)
  • Photos
  • Why etrailer?

Demco Accessories and Parts - DM5426

  • Trailer Brakes
  • Hydraulic Drum Brakes
  • Demco
  • Brake Lines
  • Brake Line Kits
  • Steel Brake Line
  • Single Axle

Designed for single-axle trailers, this hydraulic brake line kit includes a 16' steel line, a 17" steel line, a 6-1/2' steel line, an 18-7/8" flexible hose, a 3/16" tee, and hardware required for affixing lines to your trailer.


  • Provides lines and fittings needed to run brake fluid from surge brake actuator to trailer brakes
  • Designed for use on single-axle trailers with drum brakes
  • Includes:
    • (1) 193" Long steel brake line
    • (1) 17" Long steel brake line
    • (1) 80" Long steel brake line
    • (1) Hose bracket
    • (1) Brake line retainer clip
    • (1) 3/16" Brake tee
    • (4) Brake line control clips
    • (1) 18-7/8" Long flexible hose
    • (1) 5/8" Machine bushing
    • (4) #10-16 UNC x 1/2" self-drilling hex washer-head screws

Hydraulic Brake Line Installation for Single Axle Trailers

Demco Single Axle Trailer Brake Line Kit Installation Diagram

1. 193" Long steel line runs from the hydraulic actuator to the trailer axle that has brakes.

2. Brake line clips and screws let you affix the steel lines to your trailer.

3. 18-7/8" Long flexible hose connects the steel line from the actuator to the lines that go to the trailer brakes.

4. 5/8" Machine bushing is used in the connection between the flexible hose and the steel line from the actuator.

5. Hose bracket lets you attach the flexible hose to your trailer.

6. Additional steel lines (17" long and 80" long) run to each trailer brake assembly.

7. Brake line tee connects the flexible hose to the steel lines that run to the brakes.

5426 Demco Trailer Brake Line Kit - Single Axle - Drum Brakes

Video of Demco Hydraulic Brake Line Kit for Single Axle Trailers - Drum Brakes

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

Video Transcript for Demco Hydraulic Brake Line Kit Installation

On this flatbed trailer, we're going to install the Demco Hydraulic Brake Line Kit for Single Brake Axle Trailers, part number DM5426. Let's go ahead and review the parts first. Over here we've got a small parts package to hold the line as well as a T for going out to your left and right side of our axle, and some clips to hold it in place if needed. Next we have a flexible line right here. That'll go from the frame down to the axle, which your T will go in the one side. We have a nice long length of tubing here, 16 foot long.

That'll go from your hydraulic actuator out to your axle. We have a short line here that'll typically go between the T and the driver side axle, and then on the other side of the T, we have a nice long length to go over to the passenger side. First thing we do, we're going to work with our long line first, starting from our actuator going back. We'll go ahead and just straighten it out as best we can, just enough to work with it, so we can work it from the front all the way towards the back axle. We'll go ahead and take a little section at a time and unravel it as we run it towards the back. Now on our trailer here, we're pretty lucky.

It's got cut-outs built into the frame here, so we can route or align tubing along with the wiring. Once we have our line pulled throughout the frame, we'll go ahead and take back from that tubing here and run it up to our actuator. Make sure you can seat it in all the way, and then we'll go ahead and thread it on the fitting. We'll use a 3/8 line wrench to tighten it down. Now we don't have to crush it, but just be nice and snug. All right, let's go ahead and move back to the other end of our line.

We're at the back axle on our trailer here, and we'll go ahead and work our flexible line. That does come with a mount that you can attach to your frame. There's a hole already installed in it, so you can use the self-tacking screw that comes with the kit to attach it to the frame of the trailer. In our case, the trailer already had hydraulic brakes on it, and so we're actually replacing everything and it already has a bracket already installed, so we'll go ahead and use that. We'll run this into the flexible line into this part here, and there's a clip that goes into the screw right here and holds it in place. We'll get it started, and maybe a few taps to set it in place.

We'll take our long piece of tubing here, and we'll go ahead and install it into the threads right here. Now of course, we have a lot of length left over, so we'll just coil it back up the best we can to take up the slack. I like to use some round object to wrap it around and then put it into place. Just like before, we'll go ahead and run the 2 lines together, and thread down the fitting. We'll now go work the other end of our flexible line, and that'll get the T, which is this part right here. Once again, this will thread together and then we'll go ahead and tighten these 2 together. Now let's go ahead and work for our short piece of tubing here. Remember this is going to go on our driver's side. We'll go ahead and run this into our backing plate first. We'll snug that down and then we'll bend our line as we need it to go out to our T. We'll take our last section of line here, and we'll go ahead and straighten it out just like we did before. We'll run it along the axle, and we'll also attach one end to our T. We'll go ahead and bend the line as needed to make sure there's clearance above the axle and we'll go ahead and thread it into a fitting. With all the connections made for the tubing, now we can go ahead and secure it down for good. Now we're going to use a self-tacking screw going into the axle here. Now this kit does not come with the screw that I am using. I'm using a self-tacking screw that uses a 3/8 head. We'll use the supplied line clips to hold it against the axle. Now we're using the self-tacking screw that does come with it. With all the lines secured, all that remains is to go ahead and fill the reservoir with brake fluid and bleed the brakes, and then check for leaks. That'll now finish it for the install of the Demco Hydraulic Brake Line Kit for Single Axle Trailers, part number DM5426. You can find this and everything else right here at What's up, man.

Customer Reviews

Demco Hydraulic Brake Line Kit for Single Axle Trailers - Drum Brakes - DM5426

Average Customer Rating:  4.7 out of 5 stars   (12 Customer Reviews)

Designed for single-axle trailers, this hydraulic brake line kit includes a 16' steel line, a 17" steel line, a 6-1/2' steel line, an 18-7/8" flexible hose, a 3/16" tee, and hardware required for affixing lines to your trailer.

- DM5426

Excellent!!! 658824

- DM5426

Works fine 641866

- DM5426

These guys are the best! Blake was very helpful with all of my questions. My order arrived before it was promised. The parts are perfect. I will definitely continue doing business with etrailer! A very happy customer 552198

- DM5426

this makes it real easy 475519

- DM5426

Easy to install (but did need an adaptor for our master cylinder) 475488

- DM5426

Good product at a good price with fast delivery, Thanx! 342710

- DM5426

Good product 274795

- DM5426

Everything came as ordered! 273893

- DM5426

This was a good product to get me started on replacing the corroding brake system on my 15 year boat trailer. It was not an exact replacement for what I had, but I was able to adapt it to my needs. Brake line was easy to shape with common tools, and avoided the need for me to buy and learn to use a flaring tool. 265251

- DM5426

Product came on time and looks good. Just have to install. 264036

- DM5426

I was very pleased with the people at E-Trailer, especialy ricky s. 222288

- DM5426

Product delivered as promised faster than I thought it would be. 180759


Ask the Experts about this Demco Accessories and Parts

Do you have a question about this Accessories and Part?

  • Troubleshooting Trailer Hydraulic Brakes Locking Up
  • It sounds like your husband had to cut a hydraulic brake line to free-up your trailer's locked brakes. Causes for this kind of issue could be anything from a bad master cylinder in your actuator/coupler, to a blockage in one of the brake lines, to damaged/rusted brake assemblies, or to the brake fluid deteriorating. A 12-year-old trailer, even if used gently and stored properly in the off-season, could have by now developed any of the above problems. Trailer brakes should be bled and...
    view full answer...

  • Brake Line Kit Recommendation for Sailboat Trailer with Single Axle
  • I would recommend just replacing everything with one of our kits like the # DM5426. This will fit your Demco actuator and will come with everything needed. If one of the lines is in need of replacing chances are the others will soon follow. I attached an install video for this for you to check out as well.
    view full answer...

  • Demco Hydraulic Brake Line Kit # DM5426 for Use on 1993 Calkins Trailer in a Marine Environment
  • I have confirmed with my contacts at Demco, that the Demco Hydraulic Brake Line Kit # DM5426 is coated with a galvanized finish. With the additional galvanized finish, it provides the additional corrosion resistance that you are looking for compared to steel brake lines. This brake line kit is also 3/16 of an inch in diameter, and is designed for use on single axle trailers. This kit includes lines and fittings needed to run brake fluid from your surge brake actuator to the trailer...
    view full answer...

  • Recommendation on Switching from Electric Brakes to Electric Over Hydraulic Brakes
  • Mobile home axles were designed as a one time use axle. The spindle of these axles are usually come in odd sizes, making it them incompatible with standard trailer hubs and parts. If any of these part need replacing, then the standard trailer hubs and parts will not work and then you may have to change your axles. However, if you are going to reuse your wheel hubs and if you have a 5 bolt brake flanges on the axles, then we might be able to find the parts needed to convert over to hydraulic...
    view full answer...

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Info for this part was:

Written by:
Lindsey S
Installed by:
Jeff D
Expert Research:
Jameson C
Expert Research:
Adam R
Expert Research:
Rachael H
Updated by:
Laura H
Video Edited:
Dustin K

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