Also speaking at the ceremony , the director of water supplies , mr william ko chan - gock , said the service reservoir was planned and designed in - house by wsd . " this new service reservoir serves to provide the balancing storage and the breakdown storage including the fire - fighting reserve to its supply zone , " mr ko said 高赞觉说:新的配水库既可提供储水量以缓冲用水量的波幅,亦可储存应急供水,为供水区内的用户供应食水,包括后备消防供水。