The invention relates to a flushing system for a sanitary device, in particular a toilet flushing or a urinal flushing, comprising a cold water supply line (6), a warm water supply line (8), a valve arrangement (10) for admitting the water flowing through the cold water line (6) and the warm water line (8), and a water discharge line (12) for discharging the water admitted by the valve arrangement (10). Said flushing device simplifies, and preferably improves the technical problem, that is, compliance with quality criteria for the supply of cold water and hot water with regard to the water consumption in such a way that at least one temperature sensor (14, 16) for measuring the water temperature in the cold water supply line (6) and/or or in the warm water supply line (8) is provided, and for generating at least one temperature signal (T1, T2), according to the invention, a control (18) for actuating the valve arrangement (10) depending on the temperature signal (T1, T2) generates a control signal (S; S1, S2), and the valve arrangement (10) discharges water through the water discharge line (12) depending on the control signal (S; S1, S2). The invention further relates to a toilet flushing and to a urinal flushing.