This new edition remains a trusted resource for esxsential math concepts in the plumbing and pipefitting trades. With an emphasis on real-world examples that will prepare readers to successfully transfer their knowledge to on-the-job situations, this book utilizes the most currently used fitting materials to demonstrate key concepts. Simplified, clear explanations and a straightforward approach, combined with new units on changes of state, pressure and heat, and mechanical advantage, make this an ideal tool for anyone entering the field.