| 摘要 |
PROBLEM TO BE SOLVED: To improve a method for constructing drainage system for a wooden detached house. SOLUTION: In construction of a wooden low-rise detached house, a single drain pipe 5 is buried when foundation concrete 6 is placed, and a collective basin 7 is rigidly connected to an upstream end of the drain pipe. Next, erect columns and horizontal members of the wooden house 2 are mounted on the foundation concrete, and construction of the house is completed. Then, a plurality of drain source instruments such as a kitchen sink are arranged in the house, and drainage branch pipes 11 extending from the instruments are connected to the collective basin 7 through one-touch operation by peeping into an inspection hole 13 formed in a floor 12. As a result, piping work of the drainage branch pipes 11 is facilitated.
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