I read somewhere that the most prevalent machine in the world is the electric motor. I thought about that for a while and it made sense. Just look around. But then I began to wonder what the second-most prevalent machine in the world is. Turns out it’s the pump! And most pumps are connected to electric motors of one kind or another, so there you go. Throw a rock and you’ll hit a motor. Or a pump. They’re everywhere.  

I worked for a manufacturers’ rep when I was first learning about hydronics. A guy I worked with was 15 years older than me. He knew that I had absolutely no training as an engineer so he took a different tack with my education. He made me close my eyes and imagine myself as a marble rolling through the pipes.

We have so many names for common things and tools that we use in this business; and because I have way too much time on my hands, I started wondering how those names came to be.