The pump & hold method mentioned above can cause problems if you bear down too hard on the pedal. Many believe you need to do this to flush/bleed effectively. Not true.

I've used the pump & hold method and have also used a pressure bleeder. The pump & hold worked as well, if not better. The bleeder I bought was one of the typical diyer units that connects to a tire. I doubt that any of these $50-$100 units is as effective as a professional model that can apply more pressure.

My 2 cents.