DRY RISER SYSTEMS - A L Firesystems
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 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.