Problem to be solved: to provide a water treatment apparatus in which the use of the water softer is improved.The present invention relates to a raw water tank in which raw water is stored, a pretreatment unit for pretreating raw water supplied from the raw water tank, and a ro module for separating the raw water into RO and RO drains using reverse osmosis membranes for raw water pretreated by the pretreatment unit Said preprocessing unit comprises a soft water machine path including a soft water machine, a soft water bypass path for bypassing said soft water machine, a soft water flow passage valve for controlling the flow of raw water in said soft water channel, and said soft water machine pieA soft water machine pipepath valve for controlling the flow of raw water in a path path, a first pressure sensor for detecting the pressure on the inlet side of said soft water machine in said soft water channel, and a control section for automatically controlling said soft water flow valve and said soft water pipette valve based on the detected value of said first pressure sensor This is a water treatment device characterized by the fact that it is characterized by the fact that it is a water treatment apparatus.Diagram【課題】軟水機の利用態様が改善された水処理装置を提供すること。【解決手段】本発明は、原水が貯留される原水タンクと、前記原水タンクから供給される原水を前処理する前処理ユニットと、前記前処理ユニットによって前処理された原水に対して逆浸透膜を用いて当該原水をRO水とRO排水とに分離するROモジュールと、を備え、前記前処理ユニットは、軟水機を含む軟水機経路と、前記軟水機を迂回する軟水機バイパス経路と、前記軟水機経路の原水の通流を制御する軟水機通流弁と、前記軟水機パイパス経路の原水の通流を制御する軟水機パイパス弁と、前記軟水機経路内の前記軟水機の入口側の圧力を検出する第1圧力センサと、前記第1圧力センサの検出値に基づいて、前記軟水機通流弁と前記軟水機パイパス弁とを自動制御する制御部と、を有していることを特徴とする水処理装置である。【選択図】図1
