What are regulations for fire pump as per FSS code or SOLAS ?

1. In any ro/ro cargo space or any special category space, the number of hydrants with holes shall be positioned near the accesses of such spaces and be so arranged that at least two jets of water, each from a single length of hose, not emanating from the same hydrant shall reach any part of such space. 
2.  Where, in any machinery space of category A, access is provided at a low level from an adjacent shaft tunnel two hydrants fitted with hoses with dual-purpose nozzles shall be provided external to, but near the entrance of that machinery space.  Where such access is not provided from a tunnel but is provided from other space or spaces there shall be provided in one of those spaces two hydrant; fitted with hoses with dual-purpose nozzles near the entrance to the machinery space of Category A. Such provisions need not be made when the tunnel or adjacent spaces are not part of an escape route. 

Points to pounder  :

Every fire pump required to be carried under these rules shall be operated by means of power other than the ships main engines except as expressly provided otherwise in these rules.  Sanitary, ballast, bilge or general service pumps may be accepted by the Director General of Shipping as fire pumps provided they are not normally used for pumping oil and in case they are occasionally used for pumping or transferring fuel oil, suitable change-over arrangements are fitted and operating instructions are conspicuously displayed at the change-over position. 

Any fire pump shall, when discharging the quantity of water required by above paragraphgraph  through adjacent fire hydrants in any part of the ship from nozzles of sizes specified above be capable of maintaining the following pressure at any hydrant : 

                                        (a) in any passenger ship. 

                                    (i) of 4,000 tons and upwards :

                                                3.1. bar (0.31 N/mm2) 

                              (ii) of 1,000 tons and upwards but under 4,000 tons :

                                               2.7 bar (0.27 N/mm2)                       

                                (iii) of under 1,000 tons :

                                              2.1 bar (0.21 N/mm2)

                             (b) in any ship other than a passenger ship. 

                                (i) of 6,000 tons and upwards :

                                                2.7 bar (.027 N/mm2) 

                         (ii) of 1,000 tons and upward but under 6,000 tons:

                                                2.5 bar (0.25 N/mm2) 

                                (iii) of under 1,000 tons :

                                                2.1 bar (0.2) N/mm2)