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

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

Item # DM5424
Our Price: $92.18
Accessories and Parts
Shipping Weight: 2 lbs
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Designed for single-axle trailers with either disc brakes or a drum-brake torsion axle, this hydraulic line kit includes a 16' steel line, a 17" steel line, a 5-1/2' steel line, (2) 18-7/8" flexible hose, and hardware. 1-800-940-8924 to order Demco accessories and parts part number DM5424 or order online at Free expert support on all Demco products. Great prices and Fastest Shipping for Demco Hydraulic Brake Line Kit for Single Torsion Axle Trailers - Drum or Disc Brakes. Accessories and Parts reviews from real customers.
  • All Info
  • Reviews (16)
  • Q & A (0)
  • Photos

Demco Accessories and Parts - DM5424

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

Designed for single-axle trailers with either disc brakes or a drum-brake torsion axle, this hydraulic line kit includes a 16' steel line, a 17" steel line, a 5-1/2' steel line, (2) 18-7/8" flexible hose, and hardware.


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

Hydraulic Brake Line Installation for Single Axle Trailers

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

2. Additional steel lines (17" long and 66" long) run from the 193" line out toward the trailer brakes.

3. Brake line tee connects the steel line from the actuator to the steel lines that run to the brakes.

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

5. 18-7/8" Long flexible hoses connect the 17" and 66" long steel lines to each trailer brake assembly.

6. 5/8" Machine bushings are used in the connections between the flexible hoses and the steel lines.

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

5424 Demco Trailer Brake Line Kit - Single Torsion Axle - Drum Brakes and Disc Brakes

California residents: click here

Customer Reviews

Demco Hydraulic Brake Line Kit for Single Torsion Axle Trailers - Drum or Disc Brakes - DM5424

Average Customer Rating:  4.5 out of 5 stars   (16 Customer Reviews)

Designed for single-axle trailers with either disc brakes or a drum-brake torsion axle, this hydraulic line kit includes a 16' steel line, a 17" steel line, a 5-1/2' steel line, (2) 18-7/8" flexible hose, and hardware.


Although I just received the parts today I was very impressed with the packaging details (who did what) and also the map details of the tracking progress. I was a bit confused why the pkg went from Missouri to indianapolis and then all the way to Washington state and then back to NW Indiana to be handed off to the USPS. A bit strange!

I've not been able to install the brake lines yet, however i'm sure there won't be any problems. Thanks for great parts to fix my brake line issues!



This brake line kit I ordered has worked out very well and has made the braking of my trailer 100 easier. Additionally I ordered and replace the surge coupler and fluid reservoir which was worn and rusted due to previous owner salt water use. The reason to replace the brake lines was also due to salt water damage and had led to the loss of brake fluid and the clunking of the surge system. The whole kit was easy to install but it did require some time and planning because I had to route the lines external to the trailer frame vs the internal lines that were from the factory. I had to replace the Zerc fittings. All in all it is worth the time!


Everything came as stated... All the parts was very good quality. Came with everything.


Great product. I redid my older 20' snowmobile trailer and this kit work as advertised.



Still looks good and works great.


Did the job. Needed a couple of other things to complete the hydraulic system but overall it worked great.


everything worked great to install new brake lines on my trailer


Kit arrived on time and in good conditi on!


Provided the plumbing needed. The kit could use a few more of the metal tubing "holders" that screw the trailer, at least for my project I need about 6 more to hold the tubing securely.


OK but needed to make a field modification to make the brakes more serviceable in the future.


Very professional all the way and shipped right away and delivered on time. Excellent


seems like a good product. Haven"t finished installing yet. Very helpful in purchase.


Does the job


Excellent. Great fit.






See what our Experts say about this Demco Accessories and Parts

  • Does The Demco Hydraulic Brake Line Kit Use A Universal Fitting Size?
    The Demco Hydraulic Brake Line Kit # DM5424 uses a 3/16" fitting and 3/8"-24 thread size which is very much standard. I am not sure exactly what brand/model of actuator you have, but it should also use the same 3/16" fittings. Virtually all actuators made these days will use this fitting size.
    view full answer...
  • Difference Between Demco Hydraulic Brake Line Kits DM5402 & DM5424
    It looks like you ordered the Demco Hydraulic Brake Line Kit for Single Axle Trailers - Drum Brakes # DM5402; the only difference between this and the Demco Hydraulic Brake Line Kit for Single Torsion Axle Trailers - Drum or Disc Brakes # DM5424 is a minor difference between parts. The # DM5402 comes with a single 18-7/8" flexible hose which connects the brake line from the actuator to the brake lines that directly go to the trailer brakes. The # DM5424 comes with two 18-7/8" flexible...
    view full answer...
  • Brake Line for Hydraulic Disc Trailer Brakes on a Single Axle Trailer
    Brake line kit # 9504 is one that we have listed for drum brake applications which have a lower psi rating than disc brakes. What I recommend is # DM5424 that works with drum or disc brakes. This means that the lines are rated for at least 1600 psi which is typical disc brake pressure. Quarter inch line is not available. If you need 1/4 inch steel line then most auto parts stores carry various kinds of brake line and you could inquire about diameter availability.
    view full answer...
  • What to Do With Extra Hard Brake Line from Brake Line Kit
    If you shortened the lines of the Demco Hydraulic Brake Line Kit for Single Torsion Axle Trailers # DM5424 you'd have to have the ends of the line flared so what most do is coil the excess line with a tube bender. This also adds some flexibility to the lines as well.
    view full answer...
  • Brake Line Kit that Includes 19 Foot Steel Line for Disc Trailer Brakes on a Boat Trailer
    You could use Titan brake line kit # T4829900 instead. It comes with a 19 foot long steel line. Normally if brakes are only going onto one axle of a tandem axle trailer they go on the front axle, not the back axle. That is likely why so many kits only have a 16 foot line. You get better braking when the brakes are on the forward axle.
    view full answer...
  • Recommended Disc Brake Actuator For 10,000lb Capacity Trailer
    To replace your trailer's 10,000lb disc brake actuator I recommend the Titan Zinc-Plated Brake Actuator w/ Drop, Electric Lockout - Disc - 2-5/16" Ball # T4750620. This corrosion-resistant, surge-type actuator bolts over 3" wide trailer tongue and includes standard, heavy-duty coupler with 3" drop. The electric reverse lockout lets you back up without activating the trailer brakes. We don't currently carry the mounting hardware but the included instruction manual will list the necessary...
    view full answer...
  • Hydrastar Electric Over Hydraulic Brake Kit Recommendation with Single Axle Brake Lines
    Since you have a single brake axle your best option would be to go with the HydraStar EOH Kit part # HS381-9067 which includes everything but the brake lines and then from there use the from Demco # DM5424 to supply the single axle line kit.
    view full answer...
  • Flexible Brake Line Compatible With Demco Brake Line Kit For Using With Swing Away Trailer Tongue
    You will be able to pair the Demco Hydraulic Brake Line Kit # DM5424 with the 25" Line # T0980100. This will allow for you to use your swing away tongue operate. A Bracket # DM05981-95 will secure the end near your swing away to prevent the hard line from moving around and rubbing on the front of the trailer.
    view full answer...
  • Recommended Electric Brakes for an Older Demco Kar Kaddy 3
    You can add electric brakes to your older Demco Kar Kaddy 3, so you are going to need a brake actuator # DM62VR, a disc brake kit # K2R35D, and a brake line kit # DM5424. Also, the hub you're looking at # DM04369 will also work fine with this setup. You are also going to need to swap out the brake mounting flange with the Brake Mounting Flange for 2-3/8" Round Axle # 4-35 since Demco uses a non-standard flange. Just to note, you are going to have to have a qualified profession weld the...
    view full answer...
  • Selecting a Brake Line Kit for Boat Trailer Being Converted to Disc Brakes
    You are correct to place your disc brakes on the rear axle of your boat trailer since this is where most of the weight will be carried (nearer to the boat's motor). Disc brake and torsion axle applications both require flexible brake lines so yes you can use the kit you referenced, part # DM5424. This kit includes 18-7/8-inch long flexible lines, but if your measurement shows you need longer flex lines we offer various sizes of lines; part # T0777300 is 13-inches; part # T0776500 is 18-25/32-inches...
    view full answer...
  • What is Distance Between Mounting Holes of Dexter A-60 Coupler
    The distance between the mounting holes of the Dexter coupler part # DX56FR is 3 inches so it would bolt right up to your trailer. For a manual lockout you could use with this you'd want part # DX94FR. Standard brake line kits like the part # DM5424 would work just fine.
    view full answer...
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  • Adding Hydraulic Surge Brakes To a Demco Tow Dolly
    Rather than installing hydraulic drum brakes you should look at a Kodiak Disc Brake Kit # K2R35D for your tow dolly. That is the style the new Demco Kar Kaddy X Tow Dolly # DM9713093 uses as it would make for a much better setup that will be easier to install. The Kodiak Disc Brake Kit # K2R35D will allow you to slide the rotor over the existing idler hub. The brackets for the caliper will bolt to the brake mounting flange. You will need to ensure that you have this type of flange on...
    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...
  • Can Kodiak Disc Brake Kit # K2R35D Replace Idler Hubs on Demco Tow Dolly
    Thank you for including a photo of your idler hubs. The Kodiak Disc Brake Kit you referenced, part # K2R35D, requires a standard 4-bolt brake mounting flange in order to mount. The standard 4-bolt square mounting flange that this kit will fit, part # 4-35, is shown in the linked photo which includes measurements of the hole spacing. We do not recommend drilling your existing flanges; it is better to have a qualified welder replace them with the correct ones. Your existing hub appears to...
    view full answer...
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  • Recommended Disc Brake Components For Demco Kar Kaddy Tow Dolly
    For your Demco Kar Kaddy, the Demco Hydraulic Brake Actuator w/ Electric Lockout - Disc - Zinc - 2" Ball - 7,000 lbs # DM62VR will work great. The Kodiak Disc Brake Kit - 10" Rotor - 5 on 4-1/2 - Dacromet - 3,500 lbs # K2R35D will not work well with the brake flange so you will want to upgrade the flange to the # 4-35 since the Kar Kaddy has a unique flange instead of the standard. The idler hubs # DM04369 will work well without any modifications. Then you will just need brake lines...
    view full answer...
  • Compatibility of Kodiak # K2R526DS Disc Trailer Brake Kit with New EZ-Loader Axle
    As long as your new axle has a 5-bolt brake mounting flange, the Kodiak # K2R526DS should work fine for you. You'll also need a brake line kit like part # DM5424 and an actuating coupler like part # 099-175-20 for a 2 inch trailer ball. I've linked you to an FAQ article that shows everything you'll need to think about when you're adding hydraulic disc brakes to a trailer.
    view full answer...
  • Everything Needed to Install Electric Over Hydraulic Disc Brakes on Trailer with 3,500 lb Axle
    I can help you pick out the parts you would need and make it as simple as possible, but there isn't a single axle electric over hydraulic kit that includes everything. You would want to start the part # HS381-9067 which comes with the nicest actuator around, a breakaway kit, junction box and the needed wiring. For the brake components you would want the part # K2R35D for a 3,500 lb kit unless the trailer will be seeing saltwater. In that case you would want the # K2R35S instead. For a...
    view full answer...
  • Aluminum Car Trailer Restoration and Replacement Brake Recommendations
    Thanks for the feedback, and I am glad that you are finding our website helpful! For your 1989 Trailex CT-7031 all aluminum trailer with the specifications that you provided there are three options for restoring or replacing the brakes for this trailer. The three options are similar to what you mentioned, and are: 1.Hydraulic Drum, which is the most cost effective. 2.Hydraulic Disc, which is more expensive, but provides better performance. 3.Electric drum, which is most cost effective...
    view full answer...
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