I used to use a brake bleeder on my car which was made of aluminum.  I
also have a Mighty Vac hand pump that I also used to bleed brakes.  Both
of them corroded to the point that I had to throw them away.  Lesson
learned......don't let aluminum get in contact with standard automotive
brake fluid.

Carl Murakami ( from Hawaii....almost down under )

Carl,

 I wonder if there was some other reason for the corrosion. I am not arguing that youhad corrosion, only the cause. I say this because I have been running motorcycles with aluminum calipers, (both standard and aftermarket), And never saw a recomendation to not use "automotive" brake fluid. For racing I ran a high temp DOT-4 fluid. worked better than the silicone based fluids NEVER had a hint of a problem. In fact brakes were one of the few items I never needed to mess with. I ran AP calipers (the cast versions) and an AP adjustable master cylinder. The reservior was plastic, but everything else was aluminum! perhaps the DOT-3 was the bad stuff?

Bill Jepson