Describe the following fire fighters riser?,wet riser and dry riser?

A fire fighter's riser is a vertical pipe system installed in buildings to supply water to fire fighting personnel during emergencies. It is designed to ensure a reliable and efficient water supply for fire suppression operations.

A wet riser is a type of fire fighter's riser that is constantly filled with water. It is connected to a pressurized water source, such as a water tank or a dedicated fire pump, which ensures a continuous supply of water. Wet risers are typically found in high-rise buildings and are equipped with outlets on each floor, allowing fire fighters to easily access water for fire fighting purposes.

A dry riser, on the other hand, is a fire fighter's riser that is not constantly filled with water. Instead, it remains dry until it is needed during a fire emergency. Dry risers are typically installed in buildings that are not equipped with a pressurized water source. During a fire, fire fighters connect their hoses to the dry riser inlet on the ground floor and use a fire engine or a dedicated fire pump to supply water to the system. The water is then pumped up to the required floor through the dry riser, allowing fire fighters to access water at various levels of the building.

Both wet risers and dry risers play a crucial role in fire fighting operations, ensuring that fire fighters have a readily available water supply to combat fires effectively and efficiently.