Think power pumps are self-priming? Think again!

摘要

The age-old myth: I've recently read, again, that power pumps are self-priming. At best, they just tend to be self-priming. Under the right conditions, they may self-prime. The article also said that power pumps can successfully pass quantities of gas. That, also, is not true. I used to think that power pumps were self-priming. That's what I read. I learned better.