Disinfectant support for WC cistern - comprises hook incorporating syphon which carries reservoir containing disinfectant block

摘要

The support for disinfectant in a w.c. comprises a hook (1) the upper end (8) of which locates over the edge of the cistern and the lower end (11) of which engages into a recess (7a) in a reservoir (2). As the cistern fills, water enters the reservoir via the lower end of the hook and contacts the disinfectant block (3). On emptying, the water level in the reservoir drops until the cistern level falls below the lower end of the hook, breaking the syphon in the passages (14,15) and leaving the water level in the reservoir below the block until the cistern is refilled.