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Demco Hydraulic Brake Line Kit for Tandem Torsion-Axle Trailers - Drum or Disc Brakes

Demco Hydraulic Brake Line Kit for Tandem Torsion-Axle Trailers - Drum or Disc Brakes

Item # DM5425
Our Price: $162.34
Accessories and Parts
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Demco Brake Lines Accessories and Parts - DM5425
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For tandem-axle trailers with either disc brakes or drum-brake torsion axles. Includes 16' steel line, (2) 17" steel lines, (2) 5-1/2' steel lines, 1' steel line, 2-1/2' steel line, (4) 18-7/8" flexible hoses, and hardware. 1-833-496-1390 to order Demco accessories and parts part number DM5425 or order online at etrailer.com. Free expert support on all Demco products. Great prices and Fastest Shipping for Demco Hydraulic Brake Line Kit for Tandem Torsion-Axle Trailers - Drum or Disc Brakes. Accessories and Parts reviews from real customers.
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Demco Accessories and Parts - DM5425

  • Trailer Brakes
  • Hydraulic Drum Brakes
  • Disc Brakes
  • Brake Lines
  • Brake Line Kits
  • Demco
  • 15 Feet Long
  • Steel Line and Flexible Hose
  • Tandem Axle

For tandem-axle trailers with either disc brakes or drum-brake torsion axles. Includes 16' steel line, (2) 17" steel lines, (2) 5-1/2' steel lines, 1' steel line, 2-1/2' steel line, (4) 18-7/8" flexible hoses, and hardware.


Features:

  • Provides lines and fittings needed to run brake fluid from surge brake actuator to trailer brakes
  • Designed for use on tandem, torsion-axle trailers with drum brakes or tandem-axle trailers with disc brakes
  • Includes:
    • (1) 193" Long steel brake line
    • (2) 17" Long steel brake lines
    • (2) 66" Long steel brake lines
    • (4) Hose brackets
    • (4) Brake line retainer clips
    • (3) 3/16" Brake tees
    • (8) Brake line control clips
    • (4) 18-7/8" Long flexible hoses
    • (4) 5/8" Machine bushings
    • (1) 12" Long steel brake line
    • (1) 30" Long steel brake line
    • (8) #10-16 UNC x 1/2" self-drilling hex washer-head screws
  • Made in the USA


Hydraulic Brake Line Installation for Tandem Axle Trailers

1. 193" Long steel line runs from the hydraulic actuator back to the trailer axles.

2. Additional steel lines (17" long and 66" long) run from the center lines out toward the trailer brakes on each axle.

3. 12" Long steel line connects the line from the actuator to the 17" and 66" long lines that run along the first trailer axle.

4. 30" Long steel line connects the line from the actuator to the 17" and 66" long lines that run along the rear trailer axle.

5. Brake line tees connect the steel lines to one another.

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

7. 18-7/8" Long flexible hoses connect the 17" and 66" long steel lines at each axle to each trailer brake assembly on that axle.

8. 5/8" Machine bushings are used in the connections between the flexible hoses and the steel lines.

9. Hose brackets let you attach the flexible hoses to your trailer.



5425 Demco Trailer Brake Line Kit - Tandem Torsion Axle - Drum Brakes and Disc Brakes




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Customer Satisfaction Score:


Customer Reviews

Demco Hydraulic Brake Line Kit for Tandem Torsion-Axle Trailers - Drum or Disc Brakes - DM5425

Average Customer Rating:  4.7 out of 5 stars   (18 Customer Reviews)

For tandem-axle trailers with either disc brakes or drum-brake torsion axles. Includes 16' steel line, (2) 17" steel lines, (2) 5-1/2' steel lines, 1' steel line, 2-1/2' steel line, (4) 18-7/8" flexible hoses, and hardware.

by:

I got great service and even some advise on something they could not cross over to their product line. With regard to the brake line kit, the east west lines were too short and the long line from the actuator to the first axle was barely long enough for my 23’ trailer.


Comments
When looking for a replacement brake line kit, you will want to measure from the port on the back of the actuator to the T-Fitting where the lines split off and go to the separate brakes, which is typically right at the axle. There will be a short flexible line included to go from the back of the actuator to the steel line however if you measure this way the excess steel line can then be coiled up and out of the way. It is better to have a little extra rather than not enough.
-- Etrailer Expert Jenny N - 01/13/2022


by:

Is a good product , but by the recommended rubber hose for the beginning of the trailer so the line will fit perfectly otherwise it will be short.




by:

I put disc brakes on my 38 foot 5th wheel travel trailer due to the poor brake quality of the manufacturer. I now drive on the highway with much greater confidence for our safety. The stopping power of these brakes is incredible. The quality of the brakes are superior. I installed them myself finding the instructions accurate and easy to follow. There was a small part missing out of the brake line kit and the part was overnited to me by E Trailer. I have purchased many items from this company and have found the products to be of top quality and fairly priced. The customer service is outstanding. Thank you.




by:

Assembled easily. Made hooking up the plunging to my Kodiak calipers a breeze.


Comments
Breaks working great. Wish I had done it sooner. Feel much safer. Dont waste your time with the upgraded bolts. Continue to loosen. I changed mine to grade 5 fine thread with nyloc nuts.
Robert G - 07/19/2016


by:

I upgraded the 32" 12,000 lbs rated trailer to Electric/Hydraulic as the electric brakes really were not doing very much to help slow the trailer down. The overall upgrade included new 7,000# axles as well as a hydraulic converter next to the winch in the front of the trailer. This kit was perfect as it came with all the hardware needed to do the get the brake line almost to the front of the trailer. i did have to extend it a hair but that made only for one quick trip to the autoparts store versus many more if I had to do it from scratch and it was only because I wanted the pump in a specific location


Comments
If I ever get another big trailer, it will be with this axlebrake combo. The brakes work so much better than the all electric units ever did
Herb D - 10/03/2020


by:

Hard to believe its been a year already. The new hydraulic brake system works great. Took us across the mountains in N. Carolina all the way to Myrtle Beach and back with two horses in the trailer. Planning on going again this year. Love it and would deal with you all again.




by:

Great kit everything needed to install 4 wheel disk brake kit from the actuator to the calipers




by:

It's a good kit, but as it's universal I had to do some customizing to some of the lines.

With the amount of cutting and flaring of brake lines, I would have been better off going with scratch built brake lines.




by:

Kit had everything I needed to replumb the brake lines for my trailer.




by:

Everything ordered is in great shape and fits my trailer. Prices are better than anywhere else I've researched and i will definitely pass along to anyone i know needing trailer parts.




by:


No issues it works great for our a
pplication




by:

All the parts you need to connect a two axle system.




by:

ORDERED ITEM - CAME IN ON TIME - NO COM PLAINTS




by:


No issues - good product.




by:

Excellent quality! Great price!




by:

Great kit




by:

Worked perfect.




by:

No issues good product



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See what our Experts say about this Demco Accessories and Parts

  • How Many Axles is the Demco Hydraulic Brake Line Kit for
    Yes, the Demco Hydraulic Brake Line Kit # DM5425 is for tandem axle (2 axle) trailers. Attached is both review and installation videos for you to check out. I have also linked our list of helpful articles for trailer brakes as well as our selection of trailer brakes/hubs and drums for you to filter through. Let me know if you need to replace anything and I will be more than happy to make some recommendations for you.
    view full answer...
  • Can Trailer Brake Line Kit for Torsion Axle Install on Leaf Spring Axle
    Yes we actually installed the Torsion Demco Brake Line Kit part # DM5425 on a leaf spring trailer like what you asked about. You can see how we did it in the attach picture. I attached an install video for this for you to check out as well.
    view full answer...
    Image 1 for
  • Best Tandem Axle Hydraulic Brake Line Kit for a Boat Trailer
    For a tandem axle brake line kit that would work well for your trailer that would come with everything check out the part # DM5425. This comes with all of the fitting, lines and clips needed an would work well. I attached an install video for this kit for you to check out as well.
    view full answer...
  • Difference Between Drum & Disc Demco Hydraulic Brake Line Kits For Tandem Axle Trailers
    The difference is that the brake line kits for hydraulic drum brakes have two flexible hoses while the kits for disc brakes (which can be used with drum brakes) have four flexible hoses to connect to the calipers. The calipers "float" and need to move a bit which is why the added flexible lines are needed; so you'll want to choose based on what brakes you have: - Hydraulic Drum Brakes: Demco Hydraulic Brake Line Kit for Tandem Axle Trailers # DM5429 - Hydraulic Disc Brakes: Demco Hydraulic...
    view full answer...
  • How to Convert Demco Drum Brake Line Kit DM5428 to be Compatible with Disc Brakes
    All you would need to make the Demco brake line kit part # DM5428 compatible with disc brakes is additional flex lines for what connects to the calipers. Reason being the calipers are floating and they need to move a little bit. So for that you'd need four of the part # DM05982.
    view full answer...
  • Parts Needed To Add Surge-Type Actuator And Brake Lines To Tandem trailer With Disc Brakes
    You are correct that there is only one fluid outlet on the coupler, part # T4750800 you referenced. This is the master cylinder on the coupler that sends fluid through the brake lines to the brakes. I have attached a photo of the coupler that shows the attach point for the brake line, and also a drawing that shows how the lines on a typical tandem axle trailer are run. For a tandem axle with 4 disc brakes I recommend the Demco Hydraulic Brake Line Kit, part # DM5425. This kit includes...
    view full answer...
    Image 1 for Image 2 for Image 3 for
  • What Size Brake Line Should be Used with the Titan Actuator part # T4750800
    The Titan actuator part # T4750800 that you referenced is designed to work with the standard trailer brake line size of 3/16 inch like what comes with the part # DM5425.
    view full answer...
  • Brake Line Kit for Tandem Axle Disc Brakes
    Yes we do. I recommend using part # 9579-2 line kit. If you are installing the kit on a utility trailer or a trailer that has a floor, you can run the lines along the underside of the trailer. If you have a boat trailer, you will need additional flex lines to make the transition between the rigid brake lines at each axle. I recommend using two of part # 80910.
    view full answer...
  • Brake Lines for a 5th Wheel Toy Hauler with Disc Brakes that Weighs 15,000 Pounds
    As you convert your 5th wheel toy hauler to disc brakes, you will have at least a 1,600 pound psi rating. The brake line kit I recommend is the Demco hydraulic brake line kit for tandem axle trailers # DM5425. This kit will provide lines and fittings needed to run brake fluid from surge brake actuator to trailer brakes. This kit is also the most popular one we currently offer. Please view the installation video I included as well.
    view full answer...
  • Electric Over Hydraulic Disc Trailer Brakes with 6 on 5-1/2 Bolt Pattern
    We have disc brakes for a 6 on 5-1/2 bolt pattern but the rest of the kit will need to be pieced together. I have included a link to all of the disc brake options we have with a 6 on 5-1/2 bolt pattern. For a brake line kit, if needed, we have # DM5425. For an electric over hydraulic actuator you can use # T4813100 which is the same one that is in kit # T4843800. I have included a link to our help article on the parts needed to add electric over hydraulic disc brakes to a trailer.
    view full answer...
  • Single Axle Brake Line Kit Needed for Triple Axle Trailer to Make a Triple Axle Disc Brake Kit
    You wouldn't need a triple axle brake line kit, # HS496-253, because the Titan Disc Brake Kit # T4843800 already comes with 2/3 of what you need. So you would need a single axle kit # DM5424 or # DM5425.
    view full answer...
  • Dimensions of the Kodiak Disc Brake Kit # K2R526D
    I went out into our warehouse to get all of the dimensions you requested. The inner diameter of the center hole for the rotor is 3.6 inches. The diameter of the bolt holes in the rotor are .52 of an inch. From the mounting surface of the rotor to the rotor center measures 2.25 inches. From the mounting surface of the caliper to the rotor center measures 3.15 inches. On the thicker side of the caliper the distance from the mounting flange to nearest portion of the rotor is 2.6 inches. On...
    view full answer...
  • Best Electric Over Hydraulic Brake Actuator for Trailer Disc Brakes
    We prefer the Hydrastar Actuator part # HBA16 as it is the most reliable and works the best. This would be the best option for your trailer. We have the least amount of issues with this actuator and it is the one our installers like the most so we recommend it the highest. For a tandem axle brake line kit that uses rigid lines except for the lines that attach to the assemblies you would want the part # DM5425. Or if you wanted a kit that has the lines, a breakaway kit, and the actuator...
    view full answer...
  • Disc Brake Conversion for 5th Wheel Trailer with 8-Lug/12-Inch Hub/Drums and Tandem 6K Axles
    Converting a 5th wheel trailer from electric drum brakes to electric-over-hydraulic disc brakes will require a couple of items: the disc brake kit of hub/rotors and calipers, a brake line kit, an electric-over-hydraulic actuator, a breakaway kit and a brake controller such as the excellent Prodigy P3 # 90195. The linked article covers each of these items and is a good starting point for planning your project. A link is provided that will show you all disc brake kits with the 8-on-6-1/2-inch...
    view full answer...
  • Brake Lines and Electric Over Hydraulic Actuator for Disc Brakes on 8,000 lb Axles
    The Demco Hydraulic Brake Line Kit # DM5425 will work for your disc brake set up, but it is not the exact same part, it does have different length fittings. The Dexter DX Series Electric Over Hydraulic Brake Actuator for Disc Brakes - 1,600 psi # K71-651 is compatible with your axles. These actuators don't have a weight capacity, they put out a certain amount of pressure that will work with either disc or drum brakes, with disc brakes like yours needing more pressure. They will be effective...
    view full answer...
  • Electric Over Hydraulic Disc Brake Kit Recommendation for AL KO 6k Axles
    Thanks for getting me the information I would need to help you pick out a disc brake kit. I was able to determine that you have inner bearing 25580 and outer bearing 14125A so the kit you would need would be the part # K2HR712. You would need two of these kits for all of your axles. For a tandem axle brake line kit you would want the part # DM5425 and for an electric over hydraulic actuator we like the Hydrastar the best here, part # HBA16.
    view full answer...
  • Using Electric Over Hydraulic Trailer Brake Actuator on Airstream Trailer With Excella Vacuum Brakes
    From what I've read online, in its day, the Airstream Excella vacuum braking system worked very well, but at this point, they're obsolete. Replacement parts are difficult to find and the parts that would need to install on the vehicle aren't readily available. I saw several references in the forums to folks who simply changed their brakes to an electric drum system, which would be your least expensive option. If you wish to go this route, I'd need to know your inner and outer bearing reference...
    view full answer...
  • Disc Brake Kit Recommendation for Lippert 7k Axles
    The disc brake kit # K2HR712D that you referenced should work well for you. You would need a quantity of 2 of these for each of your axles. These have the same bolt pattern as your current setup and are rated a 7k. You can verify that these will fit your spindle by removing a current hub and checking the numbers on the bearings. If they are 25580 for the inner and 14125A for the outer this kit would fit the spindle and work well. This kit will fit a spindle that has a diameter of 1.25...
    view full answer...
  • Recommended Parts to Convert Electric Brakes on 5th Wheel to Electric Over Hydraulic
    We don't offer a complete kit for 7K axles, but we do have hub/rotors or slip on rotors that could work depending on the inner and outer wheel bearings or wheel bolt pattern your hubs currently use. For instance, if your hubs use a 25580 inner bearing and a 14125A outer bearing, two of the Kodiak # K2HR712E kits which include the hub/rotors, calipers and caliper brackets would be a good start. The bearings and races are included. You'd also need a line kit like part # DM5425 and an electric...
    view full answer...
  • Converting Drum Brakes on 5th Wheel Trailer to EOH Disc Brakes
    Converting a 5th wheel trailer from electric drum brakes to electric-over-hydraulic disc brakes will require a couple of items: the disc brake kit of hub/rotors and calipers, a brake line kit, an electric-over-hydraulic actuator, a breakaway kit and a brake controller such as the excellent Prodigy P3 # 90195. The linked article covers each of these items and is a good starting point for planning your project. A link is provided that will show you all disc brake kits with the 8-on-6-1/2-inch...
    view full answer...
  • Titan Electric Over Hydraulic Brake Parts Recommendation for 5,200 lb Axle
    I have a solution for you, but all of the kits we offer are all designed for 3,500 lb axles. For the actuator you would want the Titan BrakeRite I Plug and Play Electric-Hydraulic Actuator Kit # T4813102 that comes with the breakaway kit. For a tandem axle brake line kit you would then want the # DM5425, and then for a disk brake kit for 5,200 lb axles you would want the part # K2HR526DKG. The hubs have a 6 on 5-1/2 inch bolt pattern and would require the bearings part # 25580 and # 15123...
    view full answer...
  • Complete Disk Surge Brake Setup Recommendation for a Rogue Tandem Axle Boat Trailer
    We have everything you need, just not in one kit. For a disk brake kit that will bolt up to your 4 bolt brake flanges and will slip over your 5 on 4-1/2 inch bolt pattern you would want the part # K2R35D for a dacromet finish. Or if your trailer will see salt water I would recommend the stainless steel kit part # K2R35S. You will need a quantity of two of these kits for both axles. For a brake line kit you will need the part # DM5425. And then for a surge brake actuator you would want...
    view full answer...
  • Brake Controller Recommendation for a Trailer with Electric Over Hydraulic Brakes
    I have a solution for you, but the Prodigy RF Brake controller part # TK94FR is not compatible with electric over hydraulic brakes. Instead I would recommend the Prodigy P2 Brake Controller part # 90885 as this controller is compatible with EOH brakes. The Demco Hydraulic Brake Line Kit # DM5425 would work fine with AL-Ko calipers. The Adapter part # F77R would work for converting the 7-way round he has on his trailer. A better solution would be to not use an adapter and match both the...
    view full answer...
  • Recommended Disc Brakes for a Magic Boat Trailer with 3,500 Pound Tandem Axles
    Adding a disc brake system will be a great addition to your Magic boat trailer. The parts you will need are a brake mounting flange, spindle, disc brake assembly, hydraulic disc brake actuator and brake line kit. I recommend the Kodiak disc brake kit # K2R35DKG because it has rust resistant disc brakes and is great for boat trailers. The cast iron, slip on over the hub rotors are great because you won't need to replace your entire hub assembly. Note, as long as your bolt pattern is 5...
    view full answer...
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Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Jeff D
Installed by:
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Employee Jameson C
Expert Research:
Jameson C
Employee Adele M
Updated by:
Adele M
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
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Employee Dustin K
Video Edited:
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