why this is irrelevant is the next pump of the brake pedal
Yes, and I found I have to make numerous trips to refill the master (sometimes running it out
) and pump a gallon of CLEAN brake fluid into the catch can which gets wasted by being contaminated by the dirty stuff.
With the catch can above the caliper, less pumps, I only have to fill the master once, maybe twice and use about a 1/10 th of my clean fluid compared to chasing air bubbles.
Also, if you are doing it yourself, when you turn your back on the catch can and go back to the pedal, you have no way of knowing if an air bubble is working it's way back to the system. And it DOES happen.
