well when you say Bialetti I assume you mean one of these yokes?I don't water it down loads, just a little, I'm not drinking 20 cups worth of espresso a day (I hope)
wiki says
Moka pot - Wikipedia, the free encyclopedia
"Moka pots are sometimes referred to as stove-top espresso makers and produce coffee with an extraction ratio similar to (but somewhat higher than) that of a conventional espresso machine"
so, eh....