Flush tank drain valve assembly with a water outflow regulating system

摘要

A flush tank drain valve assembly (1) has a supporting structure (2) which includes a vessel (7); a valve body (3) which slides along an axis (A) and is associated with a float (31) housed inside the vessel (7); and a regulating system (5) for adjusting the water level inside the vessel (7); the regulating system (5) has a window (16) formed through a lateral wall (15) of the vessel (7), and a movable gate (38) for adjusting the opening of the window (16); the gate (38) is connected integrally to an adjusting rod (42) connected to the supporting structure (2) by a releasable coupling (43), so as to fix the rod (42) to the supporting structure (2) in at least two predetermined positions corresponding to respective operating positions of the gate (38) with respect to the window (16).