Dry Risers are often used in low-rise structures. The riser pipe is empty and does not contain any water. In the case of a fire, water is pumped into the riser from fire tenders through the Fire brigade inlets at the foot of the riser.,roulette play free games
list of online poker sites,High-rise structures have wet risers. The riser pipe in these systems is always full of water and is pressurised by gravity tanks or specialised fire pumps. As a result, water is constantly accessible for firefighting. On wet riser systems, fire brigade inlets are also supplied to deliver water in the event that the system fire pumps fail.