Complete 25 Foot Brake Line Kit With Actuator And Electric Brakes For 3,500lb Boat Trailer

Updated 03/31/2026 | Published 03/26/2026

Products Featured in This Question

Demco Hydraulic Brake Actuator w/ Drop - Drum - Zinc - 2-5/16" Ball - 8,000 lbs

(55)

$345.01

Demco Hydraulic Trailer Brakes - Free Backing - Galvanized - Left/Right - 10" - 3.5K

(173)

$168.23

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

(6)

$155.31

Question:

I need 22 foot main line for boat trailer. I am looking at Demco break assys. What is the kit p/n ?

asked by: Ken H

Expert Reply:

Hey Ken, Sorry for the delay.

I see you already bought the Hydrastar Hydraulic Brake Line Kit - Single Axle - 25' Long, 3/16" Main Line # HS496-251. That is a good option since it's always nice to get a few extra feet just in case you need it. Just to make sure, you have a single axle boat trailer right? That's what this kit is for.

Then I also see you got the Demco Hydraulic Trailer Brakes - Free Backing - Galvanized - Left/Right - 10" - 3.5K # 40716-15 and Demco Hydraulic Brake Actuator w/ Drop - Drum - Zinc - 2-5/16" Ball - 8,000 lbs # DM8759411.

Good job on getting galvanized and free backing. That is really ideal for boat trailers. The actuator doesn't have a reverse lockout, so it's good that the brakes are free backing so that you don't have to add a lockout to the actuator. Did you verify you do have a 3,500lb axle?

It looks like you made my job easy today since you found all the correct parts already. If there is anything else you need, feel free to reach out! What kind of boat and trailer are you working on?