Abstract: A controller assembly for an automatic flush valve provides economical approach to transforming a manual flush valve into an automatic flush valve. The controller assembly includes a base for holding a battery set and a sensor into a combination, and a cap covering the combination. A solenoid valve and a membrane below the combination are receiving in a socket of a foundation. A ring is rotatably mounted around a bottom of the foundation. A sleeve passing the cap is mounted around the foundation and stands on the ring. The ring allows the controller assembly to be easily assembled with a valve body of any type into an automatic flush valve or to be easily removed from the automatic flush valve and replaced by a manual controller assembly so as to form a manual flush valve. Thereby, the transformation can be economical accomplished without replacing the existing valve body.

Abstract: A water-separating apparatus for toilet tank bridges a toilet tank and a water supply includes a concentric tube, a distributing tube and a solenoid valve. The concentric tube has a large tube containing a small tube, and an inlet connecting to the water supply and an outlet connecting to the distributing tube. The solenoid valve is connected to an inlet of the small tube of the concentric tube. The distributing tube has a large tube containing a small tube, and an inlet connecting to the concentric tube and an outlet connecting to a tube of the toilet tank. The concentric tube can divide the water supply to a plurality of water flows to meet multiple water supply requirements of the toilet tank and simplify the piping configuration outside the toilet tank.