(1) A sink shall be so located that at least one of its sides will be against an external wall or in a window recess or in a position to ensure suitable connection.
(2) (a) Sinks shall be constructed of glazed stoneware, enameled fireclay or other equally suitable material;
(b) they shall be of such shape as will facilitate their maintenance in a state of cleanliness;
(c) no wood work shall be used for covering any such sink;
(d) the bottom of the sink shall slope towards the outlet.
(3) (a) A pipe shall be joined to the sink by a bell mouth at the bottom of the sink having its internal diameter about one inch larger at the sink than at the other ends;
(b) the sink outlet shall be fitted with a brass grating and a plug;
(c) the sink waste pipe shall have an internal diameter of not less than 5 cm (2 inch) and shall be preferably provided with a trap of drawn lead or other equally suitable material fitted with a brass cleaning screw at the bend.