Every bath, wash basin, sink or similar apparatus installed for use in any premises shall be -
so constructed or arranged that every inlet for water is hydraulically separate from, and unconnected with, any water outlet; and
provided with a watertight and readily accessible plug or some other device capable of closing the water outlet.
Paragraph (1)(b) shall not apply to any
shower bath or shower tray;
apparatus to which water is delivered at a rate not exceeding 3.6 litres a minute, or in the case of a washing trough. 3.6 litres a minute to any unit of it. solely from a fitting designed or adapted for that purpose; or
apparatus installed in any hospital or used in any medical, dental or veterinary practice which is designed or adapted for use with an unplugged outlet