Abstract: A toilet 10 has a bowl 20, a connection pathway 31, an ascending pathway 32, and a descending pathway 33 across a weir 34. The descending pathway 33 includes an expanded section 33a having a greater pipeline diameter and a tapered end 33b having a narrower opening area than that of the expanded section 33a, and is connected with a drain socket 70. The drain socket 70 has an inner drain conduit socket member 72 that is attached to be located inside a drain conduit 90. The inner drain conduit socket member 72 has an extended socket section 75, which is located below a floor surface FL of a lavatory and has a greater pipeline diameter, and a tapered conduit section 76, which has a narrowed diameter. These sections 75 and 76 constitute a siphon action induction module.

Abstract: A toilet 10 has a bowl 20, a connection pathway 31, an ascending pathway 32, and a descending pathway 33 across a weir 34. The descending pathway 33 includes an expanded section 33a having a greater pipeline diameter and a tapered end 33b having a narrower opening area than that of the expanded section 33a, and is connected with a drain socket 70. The drain socket 70 has an inner drain conduit socket member 72 that is attached to be located inside a drain conduit 90. The inner drain conduit socket member 72 has an extended socket section 75, which is located below a floor surface FL of a lavatory and has a greater pipeline diameter, and a tapered conduit section 76, which has a narrowed diameter. These sections 75 and 76 constitute a siphon action induction module.

Abstract: A flush water supply system comprising a passageway valve mounted in a pipeline for supplying flush water to a toilet stool, and a control circuit for controlling the closing and opening of the passageway valve. A constant flow valve is mounted in the pipeline for keeping a predetermined amount of discharge flow, irrespective of water supply pressure.

Abstract: A flush water supply system comprising a passageway valve mounted in a pipeline for supplying flush water to a toilet stool, and a control circuit for controlling the closing and opening of the passageway valve. A constant flow valve is mounted in the pipeline for keeping a predetermined amount of discharge flow, irrespective of water supply pressure.

Abstract: A flush water supply system comprising a passageway valve mounted in a pipeline for supplying flush water to a toilet stool, and a control circuit for controlling the closing and opening of the passageway valve. A constant flow valve is mounted in the pipeline for keeping a predetermined amount of discharge flow, irrespective of water supply pressure.