Flush valve apparatus

A flush valve assembly, comprising

• a flush valve having a valve inlet configured to be fluidly coupled to a pressurized water source and a valve outlet configured to be fluidly coupled to a toilet or to a urinal;
• a solenoid valve;
• a presence sensor;
• a controller;
• and
• a flow sensor or a pressure sensor,
• wherein
• the solenoid valve, the presence sensor, the controller, and the sensor or pressure sensor are in electrical communication,
• the flush valve comprises a piston,
• the flush valve is configured to deliver a first pre-set volume of flush water to the toilet and a second pre-set volume of flush water to the urinal during a flush cycle,
• the controller is configured to open the solenoid valve to initiate the flush cycle, causing the piston to lift off a valve seat to open the flush valve to allow the pressurized water to pass through the valve outlet to the toilet or the urinal,
• the controller is programmed with the first pre-set volume of flush water or the second pre-set volume of flush water to be delivered to the toilet or to the urinal during the flush cycle, respectively,
• the flow sensor or pressure sensor is configured to detect a volume of flush water entering the flush valve inlet and/or exiting the flush valve outlet and to communicate the flush water volume to the controller, and
• the controller is configured to close the solenoid valve when the first pre-set flush water volume or the second pre-set flush water volume has been reached.