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In 1970 I went to work for a manufacturers rep on the Isle of Long and I fell in love with hydronics. We sold Bell & Gossett and one of the elder salesmen took me aside one day and taught me about the marble.
"How will I know which way is right?" I asked. "You'll feel it," he said. He was giving me the essence of what engineers call delta-P, or pressure differential, and I liked his way because I really could feel it. He also showed me how to use the Bell & Gossett System Syzer, and that tool eventually became my American Express Card of Heating. I wouldn't leave home without it. The elder salesman also showed me how to size circulators in a commonsense way and I liked that, too. They had me working inside then. I was one of the guys on the phones. I would take about a hundred calls each day and many of them went like this: "Hello, this is Dan."
"Yeah, listen. I got this pump and it ain't working. I got to get a new one and I need it in a hurry."
"What can you tell me about the pump?" "It's red." "Uh huh, and what else can you tell me?" "It's broke."
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"When you're sizing circulators, or even when you're just looking at a hot water job," he said, "you should imagine that you're inside the pipe, rolling from one end to the other like a marble." I nodded and smiled. This was something that I could see in my mind's eye. "And whenever you get to a tee," he continued, "just ask yourself which way would you go if you were a marble."
| Dan Holohan - [Intro] | [Email] | [Website] |
| The views expressed in this article are those of the individual author and do not necessarily reflect the views of the management or staff of MasterPlumbers.com |
