1.Vessels with accommodation shall have a potable water installation. Potable water tank filling apertures and potable water hoses shall be marked as being intended exclusively for potable water. Potable water filler necks shall be installed above the deck.
2.Potable water installations shall:
(a)on their inner surfaces be made of a material which resists corrosion and poses no physiological danger;
(b)be free of pipe sections where a regular flow of water is not guaranteed, and
(c)be protected against excessive heating.
3.In addition to paragraph 2, potable water tanks shall:
(a)have a capacity of at least 150 l per person normally living on board, and at least per member of the minimum crew;
(b)have a suitable, lockable opening to enable the inside to be cleaned;
(c)have a water level indicator;
(d)have ventilation pipes which lead to the open air or are fitted with appropriate filters.
4.Potable water tanks shall not share walls with other tanks. Potable water pipes shall not pass through tanks containing other liquids. Connections are not permitted between the potable water supply system and other pipes. Pipes carrying gas or liquids other than potable water shall not pass through potable water tanks.
5.Potable water pressure vessels shall operate only on uncontaminated compressed air. Where it is produced by means of compressors, appropriate air filters and oil separators shall be installed directly in front of the pressure vessel unless the water and the air are separated by a diaphragm.