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Hydrastar Hydraulic Brake Line Kit - Tandem Axle - 25' Long, 3/16" Main Line

Hydrastar Hydraulic Brake Line Kit - Tandem Axle - 25' Long, 3/16" Main Line

Our Price: $231.30
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Shipping Weight: 4 lbs
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Thick, durable brake line kit lets you run brake fluid from your brake actuator to your trailer brakes. Ideal for trailers with disc brakes. Includes 25', 6', and 4-1/4' brake lines, 3/16" flex lines, plus fittings and hardware. 1-636-306-4830 to order Hydrastar accessories and parts part number HS496-252 or order online at Free expert support on all Hydrastar products. Great prices and Fastest Shipping for Hydrastar Hydraulic Brake Line Kit - Tandem Axle - 25' Long, 3/16" Main Line. Accessories and Parts reviews from real customers.
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  • Reviews (15)
  • Q & A (0)
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  • Why etrailer?

Hydrastar Accessories and Parts

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

Thick, durable brake line kit lets you run brake fluid from your brake actuator to your trailer brakes. Ideal for trailers with disc brakes. Includes 25', 6', and 4-1/4' brake lines, 3/16" flex lines, plus fittings and hardware.


  • Brake lines and fittings let you run brake fluid from your brake actuator to your trailer brakes
    • Designed for use on tandem-axle trailers with drum or disc brakes
  • Durable, corrosion-resistant copper-nickel alloy lines
  • Flexible and kink-proof design is great for foldaway trailer tongues
    • More economical and easier to install than rigid steel lines
  • Thicker walls compared with standard steel brake line kits provide additional strength and durability
  • Rubber flex lines are perfect for disc brakes and torsion axles
  • Brass, male, double-flare nut fittings on ends of each hose
  • Corrosion-resistant, brass tee fitting connects 3 hydraulic lines
    • Female inverted flares (FIF) at each port
  • Heavy-duty hose clamps secure hoses to your trailer's frame
  • DOT compliant
  • Kit includes:
    • (1) 25' Long brake line with 3/8"-24 inverted flare nuts
    • (1) 6' Long brake line with 3/8"-24 inverted flare nuts
    • (2) 4-1/4' Long brake lines with 3/8"-24 inverted flare nuts
    • (4) 18" Male/female rubber flex lines
    • (1) 3/16" Brass, round T-fitting
    • (2) 3/16" Brass union fitting
    • (1) 3/16" Brass, round X-fitting
    • 1/2" Nylon hose clamps
    • 3/16" Nylon hose clamps
    • 1/2" Nylon hose clamps
    • Self-tapping screws


  • Main line inner diameter: 3/16"
  • Fitting sizes: 3/16" and 3/8"
  • Lifetime warranty

496-252 Hydra Star Hydraulic Brake Line Kit - Tandem Axle - 25' - 3/16" - Model BL-25T

Item # HS496-252

Customer Satisfaction Score:

Customer Reviews

Hydrastar Hydraulic Brake Line Kit - Tandem Axle - 25' Long, 3/16" Main Line - HS496-252

Average Customer Rating:  4.5 out of 5 stars   (15 Customer Reviews)

Thick, durable brake line kit lets you run brake fluid from your brake actuator to your trailer brakes. Ideal for trailers with disc brakes. Includes 25', 6', and 4-1/4' brake lines, 3/16" flex lines, plus fittings and hardware.


Product was used and works fine I had to cut 1/4 inch line to run it as I wanted to bothsides and teed it infront of drivers side to across to curbside for othere wheels which I ran a 3/16 line to each wheel. I had to buy extra fittings but all worked out brakes work as designed.

I had to upgrade my fifth wheel to a motorhome do to my wifes disability how ever every thing worked out just fine fo the short time I used it.
Roy - 01/22/2018


I recently ordered a complete hydraulic disc brake kit for my horse trailer, as I wanted to change out the worn out electric drum brakes with something better. I worked with Carla on getting all of the right parts to make this changeover. She was very helpful and made sure that I got all of the necessary parts on order. I received everything in one shipment and set out to install the brake kits on all four wheels.

I ran into a problem with the brake line kit that was supplied by HydraStar...they didn't include the brake lines and fittings for the second axle as was specified in my order, so I had to make a special run to my local auto parts house to get the lines and fitting at an additional cost. I placed a call to eTrailer to let them know what happened and they said that they would have a tech from HydraStar give me a call. NEVER GOT A CALL FROM THEM!!!!!! Anyway, the installation proceeded and all went smoothly after that. It took me two and a half days to do this entire installation myself and I am very happy with the results. I just got back from a 2000 mile trip with the trailer and everything worked perfectly. Thank you Carla and eTrailer for your help and providing good quality products.


I changed out my electric drum brakes on my Montana fifth wheel with this hydraulic brake actuator and Kodiak discs rotor system . What a difference this new brake system has made. I can now lock down the trailer tires if needed and drive much more relaxed on the highway knowing I can stop on a dime.


Everything was very quick and arrived on time. Did get 2 damaged caliper fittings but customer service was awesome and is going to send me replacements. I would suggest that better packaging for the calipers.


Have not installed items at this time, but service has been GREAT so far. Waiting for a few more parts.

working great
Eddy L - 02/20/2018


etrailer as always has what I need, ships fast, and product is "as advertised"!
A pleasure to talk to the tech's when I have questions and even go as far as calling manufacturer to verify equipment selections.
Keep up the GREAT work.


Quality product. Measure properly as I got the kit that was too long.


Easy to shape (bend) to fit


Everything you need. I installed as part of whole new EOH system. Dream to install.







great service and quick delivery.


See what our Experts say about this Hydrastar Accessories and Parts

  • Installing Hydraulic Disc Brakes on a 5th Wheel Trailer
    I can help you correctly run hydraulic lines on your trailer. Adding disc brakes is a great idea, but the reason you are having such difficulty finding a schematic is because hydraulic brakes are rarely installed on 5th wheel trailers and they are typically installation specific. I have made a diagram of a typical setup on a trailer for you to look at. In this diagram I have run the main line down the driver's side frame of the trailer so the shorter lines are needed to the driver's...
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  • Brake Line Kit Recommendation for Use with HydraStar Actuator part # HBA16
    The HydraStar Actuator part # HBA16 that you referenced has a kit specifically designed for it that includes a 1/4 inch feed line. For that you'd want the HydraStar kit part # HS496-252 which comes with a 25 foot long feet line.
    view full answer...
  • Recommendation on Switching Vacuum Over Hydraulic Brakes to Electric Over Hydraulic Brakes
    Since the braking power is still hydraulic, you should have no issues converting from a vacuum over hydraulic system to an electric over hydraulic (EOH) system. The electric over hydraulic actuator will take the place of the vacuum that pressurized the existing brakes. Now, since you have disc brakes already installed on your trailer, I recommend the HydraStar Electric Over Hydraulic Actuator for Disc Brakes - 1,600 psi, # HBA16. The HydraStar actuator will allow you to apply the brakes...
    view full answer...
  • Is Larger Diameter Brake Line Required when Switching from Drum to Disc Trailer Brakes
    You would only need to switch to a larger diameter brake line if the braking response was slow. You can go to a larger line if you wanted but it won't be necessary. We have 1/4 line kits such as # HS496-251 for single axle trailers, # HS496-252 for tandem axle trailers, or # HS496-253 for triple axle trailers.
    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...
  • Troubleshooting HydraStar Electric Over Hydraulic Actuator for Drum Brakes
    I was unable to find an order number for you so I don't know the exact set up you used to install the HydraStar Electric Over Hydraulic Actuator for Drum Brakes - 1,000 psi # HBA-10, but the issue doesn't seem to be the Tekonsha Prodigy P2 Trailer Brake Controller # 90885. The issue is almost certainly the wiring or brake lines you are using, and it is strongly recommend you use 10 gauge wire # 10-1-1 for the power lead of the actuator. Additionally, your brake links may be too small in...
    view full answer...
  • Parts Needed to Convert Trailer With Tandem 15k Axles to Electric Over Hydraulic From Electric
    We can get you set up with an electric over hydraulic system for your trailer with 15,000 lb tandem axles. I will say that you will not want to go with the higher pressure 1,6000 psi actuator, which is too high for drum brakes and can potentially blow out the wheel cylinder. What you can do though is go with a 1,200 psi actuator made for drum brakes, which will still give you excellent stopping power. Here is exactly what you will need for your set up: - HydraStar Electric Over Hydraulic...
    view full answer...
  • Disc Brakes for Dexter Axle Oil Hub 008-430-03
    We do have a disc brake kit that is compatible with the Dexter Axle Oil Hub for 9,000-lb - 10,000-lb General Duty Axles # 008-430-03 and for Dexter general-duty axles manufactured after May 2013. This disc brake kit is for spring axles only (which just means it will not fit torsion axles), and is the following: - Kodiak Disc Brake Kit - 11" Rotor - 8 on 6-1/2 - E-Coat Finish - Leaf Spring - 10,000 lb Dexter # K2R1058D11E These are over-the-hub rotors with cast iron calipers for exceptional...
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  • How to Convert Trailer Drum Brakes Over to Disc Brakes
    There is a good way to get the check valve out of your current actuator and save some money. What you will need to do is remove the large snap ring from the front of your actuator where the brake line attaches, pull the spring out, and at the end of the spring there will be a metal check valve. If you remove that check valve and reassemble the brake assembly without it you will be ready to use disc brakes. Or a less invasive way is to puncture the check valve, basically you would just...
    view full answer...
  • Converting to Electric Over Hydraulic Disc Brakes on 5,200 lb Axle
    Thanks for all of that excellent information, and we can put together the parts you need, as we have the exact brakes you are looking for, and just as a note you do need a 5-bolt brake mounting flange like # 4-44-1, so you will want to ensure this is what you have. If so, for the brakes I recommend: - Kodiak Disc Brake Kit - 12" Rotor - 6 on 5-1/2 - Stainless Steel - 5,200 lbs to 6,000 lbs # K2R526S Then for an actuator and breakaway battery combination I recommend the HydraStar Marine...
    view full answer...
  • Parts Needed For Converting 5th Wheel Trailer With Tandem Axles To Disc Brakes
    We have just what you need to convert to disc brakes on your fifth wheel trailer. First, I recommend the Kodiak Disc Brake Kit, part # K2HR526D. This is for one axle so for a tandem trailer you will need to order 2 kits. This kit has a 6 on 5-1/2 bolt pattern. The inner bearing has a 1.750 inner diameter and the outer bearing has an inner diameter of 1.250 inches. For a brake line kit I recommend part # HS496-152 for a 15-ft kit, and part # HS496-252 for a 25-ft kit. These are designed...
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  • Parts Needed to Convert Trailer from Electric Drum to Electric-Over-Hydraulic Drum Brakes
    To convert your gooseneck trailer from electric drum brakes to EOH (electric over hydraulic) brakes you'll need a few items, all of which are detailed in the linked article on adding an EOH braking system to a trailer. These include the hydraulic brake assemblies, the hub/drums you have, an EOH actuator like the HydraStar # HBA-12, a brake line kit, emergency breakaway kit and a compatible trailer brake controller that will work with an EOH actuator. Not all trailer brake controllers work...
    view full answer...
  • Best Parts Needed to Convert Dexter 7,000 lb Trailer Axles to Electric Over Hydraulic Disc
    For your Dexter 7k Axles we have the Dexter disc brake kit part # K71-694-695-10 which comes with the brake and hub parts for both sides of the axle. Then for a kit that includes the actuator, breakaway, 7-way kit and juntion box you'd want the part # HS381-9067. For a tandem axle brake line kit that's 25 feet long for the main line we have the part # HS496-252. You will need a brake controller that is compatible with this style of brakes. For that the best option is the Prodigy P3 part...
    view full answer...
  • Disc Brake Conversion On 5th Wheel With Tandem 4400 lb Axles
    We don't carry a kit compatible with the 4400 lb axles. We have 3500 lb assemblies that will fit your axles, but that will lower your capacity and will require new wheels because they are only compatible with 5 on 4-1/2 bolt pattern. If you choose to go this route, I recommend the Kodiak Disc Brake Kit - 10" Hub/Rotor - 5 on 4-1/2 - Dacromet and Stainless - 3,500 lbs # K2HR35DS. The brake flange may require customized mounting because you have the 4400 lb axle. We will also need an...
    view full answer...
  • Converting From Electric to Electric over Hydraulic Disc Brakes on Two 7,200 lb Dexter Torflex Axles
    Thanks for the info and we have all the parts you are going to need to convert from electric to electric-over-hydraulic disk brakes, which is the best braking system you can have for a trailer (most stopping power combined with the best overall control). A Dexter Torflex 7,200 lb torsion axle uses inner bearing # 25580, outer bearing # 02475 and grease seal # GS-2250DL. That info, along with the 8 on 6-1/2" bolt pattern, is all we need to know to get you the right set up, and I'll recommend...
    view full answer...
  • Adding Electric Over Hydraulic Disc Brakes to Boat Trailer
    While we don't have a go to kit we can build one using parts that are available. First is the HydraStar Vented Marine Electric Over Hydraulic Actuator # HS381-8067. If you are building from scratch we have the HydraStar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness # HS381-9067 to include the wiring and battery components. Second is the Kodiak Disc Brake Kit - 12" Hub/Rotor - 6 on 5-1/2 # K2HR526DKG. These assemblies are rust resistant for your boat trailer....
    view full answer...
  • Parts Needed to Convert Trailer with 8k Electric Brakes to 8k Electric Over Hydraulic Brakes
    Converting from electric drum brakes to electric over hydraulic drum is pretty straight-forward. Basically you swap out the electric brake assemblies for hydaulic ones, you run hydraulic lines and then install an actuator and you'd be all set. For hydraulic brake assemblies you'd want the Dexter Hydraulic Drum Brake Set part # 23-410-411 which is a set that includes one passenger side assembly and one driver side. The actuator kit then to go with is the Hydrastar kit part # HBA-12 as...
    view full answer...
  • Correct Complete Disc Brake Kit For 2003 Magic Tilt Boat Trailer with Tandem 3500lb Axles
    I would be happy to help! Starting with the Dexter DX7.5L A-60 Brake Actuator w Electric Lockout - Bolt On - Disc # DX29FR this will fit the 3" x 3" tongue of your 2003 Magic Tilt Trailer perfectly, and is a fantastic option due to it already including an electric lockout solenoid for the backing up the trailer. The Kodiak Disc Brake Assembly # K1HR35D you were looking at will fit your 3500lb axles perfectly, but I do recommend adding these kits to both axles of your trailer. Adding them...
    view full answer...
  • Determining Correct Replacement Brake Line Kit For 1989/1990 EZ Loader Boat Trailer
    We have a wide variety of brake line kits that may work on your 1989/1990 EZ Loader Boat Trailer but the correct kit will be dependent on the length of your specific trailer. For example if your trailer is around 15' we have the HydraStar Hydraulic Brake Line Kit # HS496-152 which includes new main line to run from the surge brake actuator on the trailer to the back of the trailer, and four separate lines to run to each braking assembly. If your trailer is longer then you will need to...
    view full answer...
  • Swapping From Electric Drum Brakes To Electric Over Hydraulic Brakes On A 2007 Coachmen Chaparrel
    To switch from electric drum brakes to hydraulic disc brakes on your 2007 Coachmen Chaparral 5th wheel you're going to need a disc brake assembly, brake line kit, electric over hydraulic actuator, breakaway kit, and brake controller. From my research it looks like you should have a 6 on 5-1/2" bolt pattern which would mean you can use the Kodiak Disc Brake Kit - 12" Hub/Rotor - 6 on 5-1/2 - Dacromet/KodaGuard - 5,200 to 6,000lbs # K2HR526DKG you were looking at. This kit is for one axle...
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  • Axle Ratings and Parts Needed to Convert to Disc Brakes for Trailer with Tandem 7,000 Pound Axles
    As long as there is nothing wrong with your current axles there is no need to replace them. If your concern is because combined their capacity only equals 14,000 pounds that's not a problem because you have to keep in mind that part of the trailer's weight will be on the hitch. One of our most popular disc brake kits is the Kodiak # K2HR79E. It's for 7,000 pound axles, like yours and has a 8 on 6-1/2 bolt pattern. For the brake lines you can use # HS496-252. If you're converting to...
    view full answer...
  • Disc Brake Conversion Parts For 10,000 lb Dexter Axle Made Before 2009
    Thank you so much for that information, and we can get you everything you need to convert to a disc brake set up for your 10k Dexter axles. While there isn't a single kit, we do have all of the parts you need, and let's start with the brake kit itself: - Kodiak Disc Brakes - 11" Rotor - 8 on 6-1/2 - Raw Finish - Leaf Spring - 10K Dexter and Lippert # K2R1058D11 This kit is designed to fit your 10k Dexter axles from pre-2009, which is why the year is important, and has all the parts you...
    view full answer...
  • Compatible Parts to Convert Lippert 7K Axle to Electric Over Hydraulic Brakes
    Your Lippert 7K axle would use a 25580 inner and an 14125A outer bearing, so the # 42865-KIT hub you'd looked at would be compatible. The Kodiak # K2R712DAC slip-on disc brake kit is compatible with the 8 on 6-1/2 inch bolt pattern used by the hubs you'd chosen and the 5 bolt caliper mount is compatible with the bolt pattern on the brake mounting flange on your axle. The # HS496-252 brake line kit looks to be a good choice. The Titan BrakeRite I Plug and Play Electric-Hydraulic Actuator...
    view full answer...
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  • Brake Line Kits that Can Be Used with Dexter Disc Brake Assemblies
    Yes we do have Dexter brake lines that can be used with brake assemblies like the # K71-633-2 like with the part # HS496-252 for a tandem axle trailer or # 18SI-BLKIT which is for a single axle trailer.
    view full answer...

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