Our company, Fire Safety Protection, Inc., has been installing fire sprinkler systems in commercial and residential projects for five years. Many of these projects use the new plastic piping and quick response sprinkler heads developed over the last ten years. These materials have revolutionized the sprinkler industry, making sprinklers far more effective, easier to install, and more appropriate for use in light-commercial and residential buildings. They have also led to broader sprinkler code requirements in some areas. Here in Scottsdale, Ariz., for example, sprinkler systems are required not only in commercial projects and all apartments and motels, but even in townhouses, condominiums, and single-family homes. Sprinkler System Classification Sprinkler installation is standardized by the National Fire Protection Association (NFPA). Its standards NFPA