Part Two of John Siegenthaler’s Free Hydronics Lesson: Pipe Expansion 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… Continue reading “Part Two of John Siegenthaler’s Free Hydronics Lesson: Pipe Expansion”