29.—(1) Subject to paragraph (2), clothes washing machines, clothes washer-driers and dishwashers shall be economical in the use of water.
(2) The requirements of this paragraph shall be deemed to be satisfied in the case of machines having a water consumption per cycle of not greater than the following–
(a)for domestic horizontal axis washing machines, 27 litres per kilogram of washload for a standard 60°C cotton cycle;
(b)for domestic washer-driers, 48 litres per kilogram of washload for a standard 60°C cotton cycle;
(c)for domestic dishwashers, 4.5 litres per place setting.