Importance

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Abstract

Provided is a flush toilet device in which flushing can be effectively performed with small amount of flush water by accurately setting opening times for individual drain valves. A flush toilet device (1) of the present invention includes a flush toilet main body (2), a flush water tank (4), a first drain valve (10) configured to control flush water from a rim spout port (2d) by opening and closing a first drain port (4b) provided in the flush water tank, a second drain valve (12) configured to control flush water from a jet spout port (2e) by opening and closing a second drain port (4c) provided in the flush water tank, and a hydraulic drive mechanism (16) configured to open the first or second drain valve by using water supply pressure of flush water supplied from a tap water supply line to the flush water tank.

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First Claim