I was wondering how many pumps you think it would take to flush just one corner of the car? This is assuming that the fluid in the reservoir is clean and that the typical pump is from top to 1/4 to the floor. I know that each corner has different lengths so lets assume the right rear. I think like 4 or so.

 

I pump until there's no air bubbles coming out (use clear vacuum toobing), then do two more to make sure.

Its usually 6-8 per corner.