Dry and wet rising mains are intended for use by the Fire Brigade or other trained personnel. They provide a readily available means of delivering considerable quantities of water to extinguish or to prevent the spread of fire.
Dry risers are vertical mains fitted into staircase enclosures or other suitable positions, with outlet valves on each floor and inlets fitted at ground level to enable the fire brigade to connect to the water supply.
Wet risers are pipes kept permanently charged with water either from a storage tank (via a booster pump) or direct from the town’s main water supply.
before installing dry or wet rising mains the exact requirements of the local fire brigade must be ascertained.