An air inductor comprises an inner sleeve having a water inlet (1) and a water outlet (2). The inner sleeve is arranged to form a venturi and has a side air inlet (3). An outer sleeve has first and second different attachment means (9, 11) at opposite ends for attachment to different plumbing fixtures. The inner sleeve can be inserted into either end of the outer sleeve so as to selectably locate the first and second attachment means (9, 11) at the water inlet (1) and water outlet (2) respectively and vice versa.