In which NFPA document would you find specifications related to centrifugal pumps?

The correct answer is found in NFPA 20, which is specifically dedicated to the installation of stationary pumps for fire protection. This document outlines the standards and guidelines related to the design, installation, and maintenance of various types of pumps, including centrifugal pumps, which are commonly used in fire protection systems for their efficiency in delivering water at high pressures.

Centrifugal pumps are critical for ensuring adequate water supply in systems that require rapid and reliable water delivery, such as fire sprinklers and standpipe systems. Therefore, NFPA 20 provides the necessary specifications to ensure these pumps operate effectively within fire protection systems.

The other options focus on different aspects of fire protection and do not specifically address centrifugal pump specifications. NFPA 13 deals primarily with the installation of sprinkler systems, NFPA 25 focuses on the inspection, testing, and maintenance of fire protection systems, and NFPA 72 pertains to the installation of fire alarm systems. Each of these documents has its area of expertise, but for centrifugal pump specifications, NFPA 20 is the definitive resource.