Designed for the third-year plumbing apprentice, PLUMBING 301, Second Edition, combines a visually appealing, full-color design, clear writing style, and the most current plumbing and gas code references to deliver "need-to-know" information for both commercial and residential plumbers. Coverage begins with basic installation practices; progresses to blueprint reading, the National Fuel Gas Code, and surveying instruments; and includes special chapters devoted to the math and science of plumbing. Building on this thorough foundation, the Second Edition includes new discussions of hydronic systems, LP gas systems, ejector systems, water treatment, and electrical controls and wiring, plus enhanced content focusing on preplanning and electrical controls. Now better than ever, this valuable text gives readers the tools they need to be successful as they continue their journey into the plumbing industry. Check out our app, DEWALT® Mobile Pro™. This free app is a construction calculator with integrated reference materials and access to hundreds of additional calculations as add-ons. To learn more, visit dewalt.com/mobilepro.