Can T-Fitting Be Added to Main Brake Line When Adding Brakes to Second Axle
Updated 03/23/2026 | Published 03/20/2026
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Question:
I currently have Disc brakes installed on the rear wheels on my tandem axle Jet boat trailer, wet weight exceeds 6,000 pounds. I am considering adding a second set of disc brakes to the front axle. I have a Titan surge break actuator rated for 7,500 pounds. My question, is the brake line of adequate size to install a T to come to the front axle or do I have to replace the main brake line to the rear axle and come back to the front. I appreciate the advice.
asked by: Jeff M
Expert Reply:
Hey Jeff! If your current lines are in good shape, you can just add a T-fitting and run lines to the second axle, no need to replace the main line. Your actuator and line size are already designed to handle multiple calipers on a tandem setup like yours.
If the trailer’s older I would consider replacing all the lines while you’re adding the second set of brakes. This will save you from chasing leaks or corrosion later. The Kodiak Hydraulic Brake Line Kit # 20TA-BLKIT comes with everything you need for a clean install.
What kind of boat and trailer do you have? Any big trips coming up this spring?
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Michael M.
3/22/2026
I have a tandem axle set up brakes work find as long as you properly bleed. I have broken Two brake caliper brackets two different times. Brackets are cast steel, believe vibration is to blame, should be mild steel.
Product Page this Question was Asked From
Kodiak Disc Brake Kit - 10" Rotor - 5 on 4-1/2 - Dacromet - 3,500 lbs
- Trailer Brakes
- Disc Brakes
- Marine Grade
- 5 on 4-1/2 Inch
- Rotor
- 3500 lbs Axle
- 14 Inch Wheel
- 14-1/2 Inch Wheel
- 15 Inch Wheel
- Kodiak
more information >
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Jeff M.
3/21/2026
Awesome! Thank you for the quick reply I have a 1999 Custom Weld with a Tricker trailer.