According to NFPA standards, tanks must be installed in accordance with which code?

The correct choice is NFPA 22, which provides the standards for the installation of private water tanks for fire protection. This standard outlines the design and installation requirements specifically for tanks intended to serve as a water supply for fire protection systems. It addresses key considerations such as the construction of the tanks, water quality, accessibility, and other essential factors that ensure the tanks fulfill their intended purpose effectively in emergency situations.

In the context of NFPA 24, which deals primarily with the installation of private fire service mains and their appurtenances, it is essential to note that while this standard is crucial for piping systems, it does not provide the specific requirements related to the actual tanks themselves. The other NFPA standards listed do cover different aspects related to fire protection systems but are not directly focused on the installation standards for water storage tanks. Understanding which codes apply to specific components of a fire protection system is essential for compliance and effective implementation.