How much water pressure must dry standpipes withstand when ready for service?

Dry standpipes are critical components of fire protection systems and are designed to supply water for firefighting in buildings where a constant water supply may not be available. When dry standpipes are ready for service, they must be capable of withstanding a water pressure of 20 kg/cm². This pressure ensures that the system can effectively deliver water during emergencies, maintaining sufficient pressure to reach various floors in a building and ensuring adequate flow rates for firefighting operations.

The requirement for this level of pressure is based on standard safety protocols, ensuring that the standpipe can handle potential fluctuations in water pressure and any surge loads during firefighting efforts. This ensures reliability in the system’s performance, ultimately safeguarding lives and property during a fire emergency.