[hotshoe]

I am looking for and explanation of how these work and how they are installed. Search turned up lost of pros and cons but not much tech info. Any help?

 

[welndmn]

Think of it has a high end ball valve.
You press the brake pedal to push pressure, hit the switch for the lock, and it closes, holding the pressure.
Micro lock is also a brand name, its one of the best.

 

[hotshoe]

So does it need to be plumed with a hard line into the cab? Can it be done with braided steel line or hard line only?