Designed for the third-year plumbing apprentice, Plumbing 301 uses a straightforward, clear writing style and the most current plumbing and gas code references to deliver the "need-to-know" information for both commercial and residential plumbers. Coverage begins with basic installation practices, and progresses to include blueprint reading, the National Fuel Gas Code, surveying instruments, and special chapters devoted to connections to the math and science of plumbing. Discussions of water heaters, water treatment, trench safety, and electrical controls and wiring have been added to round out the thorough coverage. With two chapters on preplanning and electrical controls, this book will give readers the tools they need to be successful as they continue their journey into the plumbing industry.