play casino poker online,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.
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.,free joker poker slots