This text is a compilation of questions and answers regarding fire sprinkler system installation and maintenance, drawing heavily from various NFPA standards (like NFPA 13, 14, 20, and 22) and the Minnesota State Fire Code. The questions cover a wide range of topics, including sprinkler head spacing and replacement, pipe sizing and materials, valve requirements, and testing procedures. Specific dimensions, pressures, and material requirements are detailed for various system components. Finally, the answers also address personnel qualifications and building owner responsibilities related to fire protection systems.