PROBLEM TO BE SOLVED: To provide a faucet capable of suppressing deterioration of a seal member forming a valve mechanism and an actuator.SOLUTION: A faucet comprises: a valve mechanism comprising a seal member between a valve seat and a valve body； an actuator for adjusting a relative position of the valve seat and the valve body； and a water supply control part for controlling the actuator, the faucet guiding service water to a field through a conduit. The water supply control part is configured to set a relative position of the valve seat and the valve body after a field water level reaches a target water level in flooding time, to a water retention relative position which is different from a cutoff relative position where cutoff is performed in water removal.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2020,JPO&INPIT【課題】弁機構を構成するシール部材やアクチュエータの劣化を抑制できる給水栓を提供する。【解決手段】弁座と弁体との間にシール部材を備えた弁機構と、前記弁座と前記弁体の相対位置を調整するアクチュエータと、前記アクチュエータを制御する給水制御部と、を備えて構成され、導水路を介して用水を圃場に導く給水栓であって、前記給水制御部は、湛水時に圃場水位が目標水位に達した後の前記弁座と前記弁体の相対位置を、落水時に止水する止水相対位置とは異なる保水相対位置に設定するように構成されている。【選択図】図２
