What size hose is typically used to supply standpipe or sprinkler systems?

The typical size of hose used to supply standpipe or sprinkler systems is 2 ½ inch. This diameter is standard in many fire service applications because it balances the need for adequate water flow while remaining manageable for firefighting personnel.

Using a 2 ½ inch hose allows firefighters to deliver a substantial volume of water necessary for extinguishing fires and maintaining effective pressure in standpipe systems, which are designed to supply water for fire protection in buildings. This hose size is also compatible with the nozzles and fittings commonly used in various firefighting activities, ensuring versatility and ease of operation during emergencies.

The other sizes, while they may have their specific applications within fire service, do not represent the common standard for supplying standpipe or sprinkler systems. Smaller or larger hoses may not deliver the optimal flow rates required for effective fire suppression.