This textbook provides in reference form well-illustrated definitions to over 2000 plumbing terms. It takes account of recent developments and new technology, including the Model Water Byelaws 1986, the 1985 Regulations and unvented hot water systems which have been recently introduced in the UK. It is based on the new City and Guilds Craft and Advanced Craft Certificate Syllabuses 603. Suitable for students both at craft and advanced craft level, this book is designed to provide all the information needed in a single volume. It will also be of interest to the craftsman.