| 摘要 |
PROBLEM TO BE SOLVED: To recycle the drain water of an upstairs bathroom by connecting the drain port of the upstairs bathroom to the water feed port of a downstair toilet room or a laundry room on by a piping. SOLUTION: The bathtub 5 of the second floor bathroom 4 is provided with two drain ports 51, 52. The drain port 51 is connected to the water feed port 63 of the low tank 61 of a toilet room 6 and the water feed port 73 of a washing room on the first floor, by a pipe 81 branched from the way of a pipeline 8. Next, the drain port 52 is penetrated through the floor face of the second floor and connected to a water delivery pipe 83 provided along the external wall of a building 1. When the remaining hot water of the bathtub 5 is drained, the water is drained from the drain port 52 through the water delivery pipe 83. Further a stool 62 is connected to a water delivery pipe 84 and drained thereto, the drain water of an electric washer 71 is drained from a water delivery pipe 85 connected to the drain port of a waterproof pan 72. The water delivery pipes 83, 84, 85 are connected in the lump to a sewer pipe 86 and drained. Hereby, the drain water of the upper floor bathroom is recycled for the toilet and washing on the lower floor, and the drain water can be effectively utilized.
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