WC flushing device
Device fitted to a cistern to provide a controlled measured volume(s) of water to a WC for flushing.
[Note: a flushing device can be a siphon, drop valve, flap valve or pressurised cistern etc. For the purposes of the WC Specification the flushing device includes the activator (i.e. handle, button, linkages etc.) and all seals, pistons, or other integral parts.]
Interpretation given in the Regulators’ WC Suite Performance Specification