| 摘要 |
PROBLEM TO BE SOLVED: To solve problems of a conventional method for reusing rainwater or bathwater for toilet flush water, for example, the method disclosed in the utility model registration No.3026875, which has problems of inferior maintenance such as a filter replacement when a rainwater inflow part is clogged with fallen leaves and refuse and removal of precipitate in a precipitation/ filtration tank for precipitating and removing relatively large foreign matter, performance deterioration of the filtration material and clogging of a pump by easy outflow of the material of the filtration material. SOLUTION: An overflow pipe is provided in a precipitation/filtration tank to solve the problems and the overflow pipe is constituted detachably from an external communication pipe communicated with the water storage tank outside and the upper part of a precipitator.
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