Plumbing 401 is designed for fourth-year plumbing apprentices and uses a clear, easy-to-read writing style to provide a thorough understanding of practical plumbing installations and national plumbing codes. Coverage spans residential, commercial, industrial and institutional arenas and includes important topics such as service and repair, blueprint reading, installation practices, heating systems, plumbing-related science and plumbing codes. Emphasis is placed on both safety and the latest plumbing technology. This book is the fourth-year title in a four-year series of plumbing apprentice training books developed by Delmar Cengage Learning and the Plumbing-Heating-Cooling Contractors (PHCC) Educational Foundation. The series takes a spiral approach to address critical plumbing concepts, in which topics introduced in the first year book are revisited in more detail in subsequent books. This is ideal for anyone new to the field, as it mimics the most common learning experience - as plumbing apprentices and professionals gain more field experience they gain more in-depth knowledge.