What action must be taken if a system has two or more standpipes?

If a system has two or more standpipes, they must connect to the same water supply to ensure adequate and reliable water pressure and flow for fire suppression purposes. This connectivity is crucial because it allows for a coordinated response during a fire emergency, ensuring that all standpipes can draw water simultaneously from a consistent and sufficient source. Connecting to a single water supply helps maintain balanced pressure across the system, which is vital for effective firefighting operations, as it prevents one standpipe from depleting resources at the expense of another. Proper design and installation guidelines from fire codes and standards typically mandate this connectivity to enhance the overall effectiveness of the fire protection system.