The NFPA 25 2020 Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems is a comprehensive code book published by the National Fire Protection Association. It serves as a valuable resource for educational purposes, providing detailed guidance on water-based fire protection systems. This textbook, written in English, covers a range of topics relevant to advanced, intermediate, and beginner levels of adult education and further education. With a focus on practical considerations and standards, this publication is essential for those in the field of fire protection systems.