Part Two of John Siegenthaler’s Free Hydronics Lesson: Pipe Expansion Brian Hayden John Siegenthaler is the grandmaster of hydronic heating systems and in our last video, he covered fittings. In this 12 minute segment, John discusses pipe expansion. This is obviously critical information for anyone designing high-performance hydronic systems. Click here to learn more about John’s ‘Hydronics Master Class’ Click here to review Part One – the free lesson on fittings. Hydronic Heating Originally posted on October 14, 2013 Written by Brian Hayden HeatSpring co-founder. You can reach me directly at bhayden @ heatspring.com or 800-393-2044 x1. More posts by Brian