Section 25 in The Merchant Shipping (Crew Accommodation) Rules, 1960
25. Supply of Drinking Water.
(1)In every ship to which these rules apply, a supply of drinking water shall be provided in the crew accommodation from tanks of an adequate capacity for the purpose from tanks of an adequate capacity for the purpose having regard to the number of persons in the crew and the time likely to elapse between successive replenishments of the water or by other equally efficient means. If service tanks are fitted for that purpose they shall be directly connected with the ship's, main drinking water storage tanks. In ship of 3,000 tons or over, any pumping necessary for the supply of drinking water in the crew accommodation shall be by mechanical power.(2)Cold drinking water shall be laid on to taps in the galleys and pantries, and in the mess rooms provided for those members of the crew of whose use and service pantries are not provided.(3)In every ship to which these rules apply being a ship of 1,000 tons or over means shall be provided whereby the crew shall obtain access to drinking water which has been cooled by passing through a cooling "tank or by other suitable means
