What is the key feature of a dry standpipe system?

A dry standpipe system is specifically designed for use in locations where the climate or the nature of the building presents a risk of freezing in the water-filled piping. In this type of system, the standpipe itself is kept empty and does not contain water until it is needed for firefighting purposes. Firefighters first connect hoses to the standpipe and then use a fire engine or other water supply to fill the piping with water. This characteristic provides several advantages, including reduced risk of ice formation in cold climates and maintenance of the system without the need for constant water supply.

Additionally, this system is crucial in high-rise buildings where a reliable water supply needs to be established quickly during a fire emergency. Firefighters can quickly engage the standpipe system to initiate water flow when they arrive on the scene, which is essential for effective firefighting operations.