26Water pressure

26 Water pressure

(1) The water pressure created by any 2 of the fire pumps with which a ship is furnished when those pumps are operating simultaneously shall be such that, when any of the fire hoses and nozzles with which the ship is furnished are coupled to any adjacent fire hydrants in the ship and the fire hoses so coupled are, between them, delivering water at a rate equal to the pumping capacity required by these Regulations for the 2 fire pumps or 140 tonnes per hour, whichever is the lesser rate, the water pressure at every fire hydrant in the ship is not less than:

(a) in the case of a ship of 6,000 tons or over — 275 kilopascals; and

(b) in the case of a ship of less than 6,000 tons — 255 kilopascals.

(2) The diameter of the fire mains and water service pipes shall be sufficient for the effective discharge of:

(a) 140 tonnes of sea water each hour; or

(b) the maximum discharge required by these Regulations from 2 fire pumps operating at the same time;

whichever is the less.

(3) The reference in subregulation (1) to the pumping capacity required by these Regulations for the 2 fire pumps shall be read as a reference to the sum of the minimum pumping capacities that the 2 fire pumps are required to have in accordance with regulation 38.