bing tracking image
  1. Accessories and Parts
  2. Kodiak
  3. Trailer Brakes
  4. Hydraulic Drum Brakes
  5. Disc Brakes
  6. Brake Lines
Kodiak Hydraulic Brake Line Kit - Tandem Axle - 18'

Kodiak Hydraulic Brake Line Kit - Tandem Axle - 18'

Item # 18TA-BLKIT
Our Price: $171.80
Accessories and Parts
This item qualifies for Free Shipping
Shipping Weight: 4 lbs
In Stock
Accessories and Parts 18TA-BLKIT - Tandem Axle - Kodiak
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images


Need help with installation?
Locate installers near me
Brake line kit lets you run brake fluid from your surge brake actuator to your trailer brakes. Great for disc brakes and torsion axles. Includes 18', (2) 7', 3-1/2', and (2) 1-1/2' flexible hoses, plus fittings and hardware. 1-833-496-1390 to order Kodiak accessories and parts part number 18TA-BLKIT or order online at Free expert support on all Kodiak products. Great prices and Fastest Shipping for Kodiak Hydraulic Brake Line Kit - Tandem Axle - 18'. Accessories and Parts reviews from real customers.
  • All Info
  • Reviews (32)
  • Q & A (0)
  • Photos
  • Why etrailer?

Kodiak Accessories and Parts - 18TA-BLKIT

  • Trailer Brakes
  • Hydraulic Drum Brakes
  • Disc Brakes
  • Brake Lines
  • Brake Line Kits
  • Kodiak
  • 18 Feet Long
  • Flexible Brake Hose
  • Tandem Axle

Brake line kit lets you run brake fluid from your surge brake actuator to your trailer brakes. Great for disc brakes and torsion axles. Includes 18', (2) 7', 3-1/2', and (2) 1-1/2' flexible hoses, plus fittings and hardware.


  • Brake hoses and fittings let you run brake fluid from your surge brake actuator to your trailer brakes
    • Designed for use on tandem-axle trailers with drum or disc brakes
  • Flexible design makes hoses perfect for use with foldaway trailer tongues, disc brakes, and torsion axles
    • Rubber hoses meet DOT and SAE standards and are easier to install than rigid steel lines
  • Brass, male, swivel flare nut fittings on ends of each hose have deep threads
    • Deep threads improve connection to help prevent leaks
    • Swivels allow flare fittings to turn without the hose twisting
  • Open area on flare fittings lets you use a line wrench for better grip
    • Minimizes the risk of stripping threads
    • Fittings are double-crimped onto hoses
  • Corrosion-resistant, brass fittings connect hydraulic lines
    • Female inverted flares (FIF) at each port
  • Heavy-duty loom clamps secure hoses to your trailer's frame
  • Kit includes:
    • (1) 18' Long flexible brake line
    • (2) 7' Long flexible brake lines
    • (1) 3-1/2' Long flexible brake line
    • (2) 1-1/2' Long flexible brake lines
    • 1 Cross fitting
    • 1 Tee fitting
    • (20) 1/2" Loom clamps


  • Hose inner diameter: 1/8"
  • Fitting size: 3/16"
    • Thread size: 3/8"-24
  • 3-Year limited warranty on hoses and fittings

Hydraulic Brake Line Installation for Tandem-Axle Trailers

Tandem Axle Brake Line Kit

  • (A) 18' Long flexible brake line (BH-3MFS-18)
  • (B) 7' Long flexible brake lines (BH-3MFS-7)
  • (C) 1-1/2' Long flexible brake lines (BH-3MFS-1-5)
  • (D) Tee fitting (BH-T-3FIF)
  • (E) Loom clamps (A0500)
  • (F) Cross fitting (BH-X-3FIF)
  • (G) 3-1/2' Long flexible brake line (BH-3MFS-3-5)

Flexible Rubber Brake Hoses

Kodiak brake hoses are made of rubber, making them a practical choice for a variety of applications. Because you can easily bend them, rubber hoses are simpler to work with than rigid stainless steel brake lines. This flexibility makes rubber hoses great for use with foldaway trailer tongues because they are less likely to kink or break when bent. In addition, rubber hoses allow for a wide range of motion so articulating parts can effectively function. These qualities make rubber hoses better suited than steel lines for trailers with torsion axle suspension systems and trailers that have disc brakes.

Stainless steel brake lines have braided exteriors, which can not only wear against exterior surfaces, but also against the interior lining of the hose if dirt gets underneath the steel braid. And if the braid on a stainless steel line tears, it can cut into the hose lining. The exterior surface of these hoses is solid rubber, so there are no crevices for debris to enter.

Durable Fittings with Deep Threads

Kodiak Hose Flare

Kodiak brake hoses have corrosion-resistant brass fittings with stainless steel flares. These fittings have a gap built into them that allows room for a line wrench - also called a flare nut wrench - to slide over the line and down to the nut. This type of wrench grips the nut better than a standard open-ended wrench so there is less chance of stripping the threads as you tighten down the nut.

The stainless steel that is used to create the flares on these hoses is stronger than brass. As a result, these fittings are more durable than ones made entirely of brass. The stainless flares are primarily designed to keep the fittings from splitting when you tighten them down, but they offer absolute rust protection as well.

Kodiak's fittings have deeper threads than many other fittings on the market to provide a higher thread engagement. Deeper threads offer an advantage when used with fittings that have the same thread depth. These Kodiak fittings will work with most fittings on the market, but when they're used with other Kodiak fittings, the result is a stronger connection with fewer leaks.

BH-3MFS-18 Kodiak 1/8" ID Rubber Brake Hose - 3/16" MFFN with Male Swivels - 216"

BH-3MFS-7 Kodiak 1/8" ID Rubber Brake Hose - 3/16" MFFN with Male Swivels - 84"

BH-3MFS-3-5 Kodiak 1/8" ID Rubber Brake Hose - 3/16" MFFN with Male Swivels - 42"

BH-3MFS-1-5 Kodiak 1/8" ID Rubber Brake Hose - 3/16" MFFN with Dead Swivels - 18"

BH-X-3FIF Kodiak Forged Brass Cross Fitting for 1/8" Diameter Brake Hose - 3/16" Female Inverted Flare

BH-T-3FIF Kodiak Forged Brass T-Fitting for 1/8" Diameter Brake Hose - 3/16" Female Inverted Flare

A0500 Metal Loom Clamp - 1/2"

Customer Reviews

Kodiak Hydraulic Brake Line Kit - Tandem Axle - 18' - 18TA-BLKIT

Average Customer Rating:  4.9 out of 5 stars   (32 Customer Reviews)

Brake line kit lets you run brake fluid from your surge brake actuator to your trailer brakes. Great for disc brakes and torsion axles. Includes 18', (2) 7', 3-1/2', and (2) 1-1/2' flexible hoses, plus fittings and hardware.


product was exactly as described. Very happy


Hose kit was as expected. etrailer is a great source for all my RV parts needs and I really appreciate their videos and technical support materials.


Delivered as promised. The short 18” lines that go to the calipers could use a 90 degree bend on one end.


Excellent product. Very simple install. Item came in 24 hours. Multiple transactions with etrailer over the years. I have never been disappointed. Online videos are extremely helpful. Great company to deal with.

Wonderful results
Ron - 10/03/2020


It is an excellent kit for a hydraulic brake upgrade; it had all the lines you needed to complete the job right!


This is the Best money I have ever spent in regards to safety and peace of mind. I previously had drum brakes which would take a long time to dry out in the rain and we're impossible to adjust because of the drop axle.


I just received this brake line kit and laid it out on the trailer...have not actually fully installed it yet. It lays out perfectly...looking like it will be a perfect fit for my tandem axel Magic Tilt trailer for my 21' boat. Quality looks solid. I'll post more after full installation.


E trailer offered the best deal on the tires and brakes that I found. Fast shipping and curteous service from friendly staff (Ricky) made dealing with them easy and efficient. I will definitely shop with them in the future.


I put disc brakes on my 2015 Cardinal Trailer, the best decision I have ever made. Bought the pump through etrailer and have been more than satisfied.


All parts fit and one year later are working well. I am glad I made the change from Electric drum to Electric over Hydraulic disk on my 6 ton RV


The service was great and brakes are working wonderful. Exactly what I needed.


Very easy to install, because of the flex lines.


Easy to install and thus far lasted a whole season of salt water trailering


We got this item it is exactly what I was looking for.


Very pleased with the quality of the parts and service




Worked for intended purpose!


Good product


Everything shipped quickly, and was super easy to install.



Parts were exactly as stated and fit pr operly.


It will not be until spring before I get it all together


All items received quickly.


Show More Reviews

See what our Experts say about this Kodiak Accessories and Parts

  • Could Trailer Tandem Brake Line Kit be Used on Truck
    Normally trailer brake lines are only used on trailers. However, if your vehicle has brake line fittings that match what the part # 18TA-BLKIT has and the psi of the system does not exceed 1,600 psi this line could work for you as these are SAE approved. The line has an inner diameter of 1/8 inch, the fitting size is 3/16 and the thread size is 3/8-24.
    view full answer...
  • Tips for Bleeding Newly Installed Disc Trailer Brakes
    I have actually linked a video that will help you with the process of bleeding disc trailer brakes. Go to about the 9:40 mark of the video. It is basically the same as bleeding drum brakes: make sure the actuator is full of fluid, move the actuator in and out to push fluid and any air back to the calipers, loosen the top-most bleeder screw until fluid comes out. Tighten the bleeder screw and go on to the next brake assembly. Another option is to get a clear jar and some hose to run from...
    view full answer...
  • How Do Tandem Axle Hydraulic Brake Lines Typically Attach to Trailer Axles
    I believe what you mentioned is a standard way of running trailer brake lines on a tandem trailer. I attached a diagram for the brake line kit part # 18TA-BLKIT and how it normally connects to a trailer. The main feed line runs to the first axle where a Tee splits it off to run to either assembly on the axle. These lines attach directly to the axle.
    view full answer...
    Image 1 for
  • Recommended Tandem Axle Brake Line Kit For Trailer With 16 Foot Run to First Axle And 8 Foot Width
    We do have a brake line kit that will meet your needs for a 16 foot run and 8 foot width runs. I recommend the Kodiak Hydraulic Brake Line Kit - Tandem Axle - 18', # 18TA-BLKIT. This is a flexible brake line kit, so the excess line can have slack or be coiled depending on your specific trailer needs. When you click on the link for this part, scoll down and you will see the diagram of how this kit is run with the fittings and lengths of line.
    view full answer...
  • Tandem Axle Hydraulic Brake Line Kit For A Trailer Measuring 17.75 Feet From Axle To Surge Actuator
    The Kodiak Hydraulic Brake Line Kit # 18TA-BLKIT will work great for you, however I'd personally prefer to have some excess length just incase, so the Kodiak Hydraulic Brake Line Kit # 20TA-BLKIT is what I'd go with. Both of these kits have a 1/8" inner hose diameter, have a 3/16" fitting size, and has a 3/8"-24 thread size.
    view full answer...
  • Correct Length of Kodiak Tandem Axle Brake Line Kit
    The Kodiak # 20TA-BLKIT 20 foot brake line kit will work if the distance from the rear of the coupler to the front trailer axle is roughly 18 to 19 feet, as you'll need some slack for the swing-away coupler to move freely. having a little extra length won't hurt, but you don't want to come up short because you can't easily make a splice like you can with steel brake lines. So in a nutshell, the advertised length of the kit you need will be the length of the longest line in the kit, and...
    view full answer...
  • Troubleshooting Installation of Titan Replacement Master Cylinder Assembly T1777401
    Titan Replacement Master Cylinder Assembly # T1777401 for their model 6 drum brake actuator is shown in the linked review video. If you watch the video you'll see that when our reviewer handles the master cylinder the push rod assembly only travels a very small distance, perhaps 1/4-inch. If you have bled all air from the reservoir, lines and brake assemblies themselves and you do not have hydraulic pressure reaching the brakes I suggest you check that the system is filled with the recommended...
    view full answer...
  • Bleeding Trailer Brakes and Air Bubbles Won't Stop
    If the air bubbles aren't ever stopping that indicates that air is getting introduced into the brake lines. Most likely through a bad master cylinder but since we know yours is a new part # T1777401 that would make me think that most likely you are leaving the bleeder open before releasing the master cylinder which is basically allowing the lines to suck air back in. Pressurize the system, open the valve, close the valve, release pressure.
    view full answer...
  • Can Brake Line System on Tandem Axle Cattle Hauler be Upgraded
    You should be able to bypass the current hydraulic setup on your cattle trailer to add newer brake lines but to be quite honest I'm not quite sure what you mean in regards to the steel bars. I recommend going with a brake line kit that uses flexible hose for your brake connections as that will help give you a longer lasting system. We have these available in kits with a steel main line like part # T4830000 or with the flexible hose all throughout like part # 18TA-BLKIT for you to check...
    view full answer...
  • Longest Brake Line Kit For A Tandem Axle Trailer
    I took a look at what we have, and the only thing I was able to find was the Hydrastar Hydraulic Brake Line Kit # HS496-252, which measures 25' long. I also took a look at your 2019 Heartland Torque Travel Trailer Toy Hauler, and wanted to inform you that your brake line is only going from your farthest axle to the actuator or the coupler, not from the back of the trailer. At it's longest, I'd suspect that it is around 18', in which # 18TA-BLKIT would be perfect.
    view full answer...
  • Hydraulic Trailer Drum Brakes For 7 Inch Drums and 10 Inch Wheels on Tandem Axle Trailer
    We do have an option for hydraulic drum brakes that fit a 7 inch drum and are compatible with 10 inch wheels, which are the following: - Dexter Hydraulic Trailer Brake Kit # 23-398-399 This is the entire kit that includes both the left and right hand brakes, as well as the mounting hardware needed for the installation. For a tandem axle trailer you will need a pair of these kits. If you also need brake lines we have that as well depending on the length you need: - 18 Feet: Kodiak Hydraulic...
    view full answer...
  • Replacement Surge Brake Actuator, Brake Lines & Calipers For 2005 Mastercraft Pro V 205 Boat Trailer
    I recommend the Dexter DX7.5L A-60 Brake Actuator w Electric Lockout # DX93FR for your 2005 Mastercraft Pro V 205 boat trailer. This weld-on disc brake actuator is for a 3" wide by 5" tall frame, and includes a electric reverse lockout. It latches to a 2" hitch ball and comes primed so you will be able to weld it onto your frame and paint to match the trailers frame. I do see that your boat can be fitted to a single axle trailer or tandem axle depending on your setup will decide what...
    view full answer...
  • Electric Over Hydraulic Disc Brake Actuator for Camping Trailer and Chevy Factory Brake Controller
    The Tuson ActuLink Electric Over Hydraulic Actuator for Disc Brakes - 1,600 psi # 335ACT-1600 is not compatible with the Factory GM brake controller in your 2014 Chevy Silverado. My recommendation for you is to instead use an aftermarket brake controller like the Curt Echo # C51180 which will take priority over your factory controller and will work well. Another option is to use the HydraStar Vented Marine Electric Over Hydraulic Actuator for Disc Brakes - 1,600 psi # HS381-8067 which...
    view full answer...
    Image 1 for
  • What Size Fittings Does Kodiak 225 Caliper Take
    Sounds like you are trying to install the wrong brake line to the Kodiak Disc Brake Caliper # KDBC225S that you mentioned. The fitting size needs to be 3/16 inch like what comes with the # 18TA-BLKIT. Since I don't know what brake lines you have now it's hard for me to verify that you have the right thing.
    view full answer...
  • Should I Use Steel Brake Lines Or Rubber Brake Hoses For Adding Hydraulic Brake Lines?
    Using a Brake Line Kit # DM5403 that uses all steel lines with the only exception being the rubber lines down to the axle so the suspension can travel will give you the most consistent braking for your trailer. The steel lines will not expand like the rubber lines in the Kit # 18TA-BLKIT. While the steel lines will be more difficult to install and must be bent with the correct tools to prevent putting a kink in the lines it is the better option. You can often rent the tools needed for bending...
    view full answer...
  • Recommended Hydraulic Brake System for an Escort Boat Trailer
    I will be happy to help you set up a new brake system for your Escort Trailer. I'll start from the back and work my way forward. I recommend the etrailer Hydraulic Brake Kit Left/Right Hand item # AKFBBRK-35-D. This is a 3,500 lbs set of brakes that are Marine-grade and designed for surge actuators. If you have a single axle trailer you will want the Kodiak Hydraulic Brake Line Kit item # 18SI-BLKIT. For tandem axle trailers you will need the Kodiak Hydraulic Brake Line Kit item # 18TA-BLKIT....
    view full answer...
  • Brake Line Kit Compatible With Electric Over Hydraulic Actuator And Disc Brakes
    The HydraStar Electric Over Hydraulic Actuator for Disc Brakes - 1,600 psi, # HBA16 is compatible with the Kodiak Disc Brake Kit - 13" Hub/Rotor - 8 on 6-1/2 - E-Coat - 7,000 lbs # K2HR79E. The Kodiak Hydraulic brake line kit for tandem axle you asked about # 18TA-BLKIT will absolutely work with these two components, but you may want a longer kit for your application. These kits will also work: HydraStar Hydraulic Brake Line Kit - Tandem Axle - 25' Long, 1/4" Main Line # HS496-252 Demco...
    view full answer...
  • Will Kodiak Brake Line Kit part # 18TA-BLKIT Work with Hydrastar Actuator HBA-16
    Yes, the brake line kit part # 18TA-BLKIT that you referenced would work great with the Hydrastar # HBA16 and Kodiak disc brake kit part # K2HR712E.
    view full answer...
  • Recommended Parts For Adding Disc Brakes To Tandem Trailer With 6,000-lb Axles
    We have all the parts you need but they do not alll come in one kit. I will make some recommendations that will work for your 6,000-lb axles. First, you can use the Kodiak Disc Brake Kit, part # K2HR526D. This includes the hub and rotors for one axle. You will also need a bearing kit, part # BK3-100 for each wheel. Since the lug nuts, part # CE11051 are not included, you can purchase them separately. For a grease cap you can use part # F001520. For a 24-ft long brake line kit that...
    view full answer...
  • Brake Lines Compatible with Majic Tilt Trailer 22 Feet Long with Tandem Axle and Disc Brakes
    The Kodiak Hydraulic Brake Hose - 3/16" Male Fittings w/ Stainless Flares # BH-3MFS-7 will fit on your trailer if the 7 foot length is what you need. You most likely will need the Kodiak Union Fitting # BH-C-3FIF for that application. If you are looking to change all your brake lines on your 22 foot tandem axle trailer with disc brakes, I recommend the Kodiak Hydraulic Brake Line Kit # 18TA-BLKIT. This will give you everything you need (lines, fittings, clamps, etc) to replace your brake...
    view full answer...
  • If Trailer Has Breakaway Battery Installed Will it Work with Electric Over Hydraulic Disc Actuator
    If your trailer already has a breakaway battery designed for electric brakes already you would not need to purchase an additional setup. You would need the disk brake kit like the part # K2HRCM1337-9DAC that you referenced, an actuator like our favorite Hydra Star # HBA16, and a brake line kit like # 18TA-BLKIT and you would be on your way. I attached a help article that covers adding EOH brakes to a trailer for you to check out as well.
    view full answer...
  • Upgrading to Disc Brakes on a 7K Boat Trailer
    If you have a twin axle 7K trailer, you likely have 3.5K axles. Of course, you will want to verify this since this is important when considering the brakes. That having been said, the Kodiak Disc Brake Kit - 12" Rotor - 6 on 5-1/2 - Dacromet and KodaGuard - 5,200 to 6,000 lbs, part # K2R526DKG, is still a decent fit for your axles despite being rated for higher capacity ones. The reason is that these use the same psi (1500 or more) as smaller ones. Some other things to consider when looking...
    view full answer...
  • Parts Needed to Add Disc Brakes to Lippert 6k Axles
    Since we know you have 6k Lippert axles I will be able to help you pick out exactly the disc brake kits that will fit. The Kodiak kit part # K2HR526D will fit your trailer axles and will work well. This is a Dacromet coated kit that will do a great job resisting rust. If your trailer has hydraulic drum brakes currently the brake lines you currently have will fit and work well with either kit. If not for a brake kit that is 18 feet in length we have the part # 18TA-BLKIT. I attached a...
    view full answer...
  • Recommended Hydraulic Brake Assemblies, Actuator, And Brake Lines For Dual Axle RV
    For your conversion to hydraulic brakes on your 7,000 lb dual axle RV, I recommend the Hydraulic Brake Kit - Uni-Servo - Free Backing - 12" - Left/Right Hand Assemblies - 5.5K to 7K # AKFBBRK-7. These assemblies are side specific and are labeled for you. These will work with your current hub and drum assemblies. For installation and adjustment, you will want the Brake Adjustment Spoon for Drum Brakes # W80630. If you need the mounting bolts for these assemblies, I recommend # BRKH12. If...
    view full answer...

< Previous

Do you have a question about this Accessories and Part?

  • Why

    At we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate accessories and part information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Jeff D
Installed by:
Jeff D
Employee David F
Installed by:
David F
Employee Tammy D
Written by:
Tammy D
Employee Mike S
Updated by:
Mike S

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.