Which type of standpipe system has a built-in water supply?

The wet standpipe system has a built-in water supply, which distinguishes it from other types of standpipe systems. In a wet standpipe, the pipes are always filled with water, making the water immediately available for firefighting purposes. This is particularly advantageous for emergency situations, as it allows firefighters to access water quickly without the need to first charge the system.

In contrast, a dry standpipe system contains no water in the pipes until it is activated. This type is typically used in areas where there is a risk of freezing, as it helps prevent water from freezing inside the pipes. A combination standpipe incorporates features of both wet and dry systems, offering the flexibility to use both water supply methods depending on the situation. Manual standpipes require firefighters to supply water manually, making them less efficient for rapid response.

The inherent design of the wet standpipe system ensures that firefighters can respond swiftly with an immediate water supply, making it a crucial asset in fire emergency scenarios.