PROBLEM TO BE SOLVED: To solve a problem wherein measures against problems in collecting chemicals, etc. remaining in the piping, etc. are actually insufficient though the respective measures are taken against problems in the drain fluid of chemicals, etc. such as solidification of the remaining chemicals, clogging of the piping and a valve, generation of algae from spores of the algae remaining in the remaining drain water, injury to the piping, clogging of the piping and valve with the generated algae and freezing of the piping and valve because chemicals and water are sprayed from a nozzle of a sprayer, etc. in a greenhouse and it is necessary to collect the chemicals etc. remaining in the piping, etc. after spraying.SOLUTION: A tank, a power sprayer and a spray device are connected to one another with the piping, and a selector valve is disposed in the piping connecting the power sprayer and the spray device. The system for collecting the drain fluid and water, etc. in the greenhouse includes: a first route composed of the piping connecting the spray device, the selector valve, the power sprayer and the tank for feeding fluid and water； and a second route composed of the piping connecting the spray device, the selector valve, the power sprayer and the tank for collecting the drain fluid and water.【課題】 従来、ハウスにおいて、薬剤、水を、散布機等のノズルから散布しているが、散布終了後、配管等に残留する薬剤等を回収する必要がある。理由は、薬剤等の排液には、残留薬液の固化と、配管、バルブの詰りの問題、残留排水に残った藻の胞子による藻の発生と、配管等の損傷、藻の発生による配管、バルブの詰りと、その凍結問題等がある。しかし、現実には、個々の対策が採られているが十分でない。【解決手段】 本発明は、タンク、動力噴霧機、及び噴霧装置を配管で接続し、動力噴霧機と噴霧装置を連繋する配管中に、切換えバルブを配する。この噴霧装置、切換えバルブ、及び動力噴霧機、並びにタンクを連繋する配管で、給液水の供給をする第一のルートと、噴霧装置、切換えバルブ、及び動力噴霧機、並びにタンクを連繋する配管で、排液水の回収をする第二のルートとで構成したハウスの排液、排水等の回収システム。【選択図】 図１
