| 摘要 |
PROBLEM TO BE SOLVED: To comfortably take a bath with excellent drain performance and convenience by connecting the drain port of a bathtub to a floor having a bathtub pan part and a washing place part, providing a bathtub drain pipe which is water-tightly put through a bathtub pan and providing an air discharge hole in the bathtub drain pipe. SOLUTION: The bathtub 1 is arranged in the bathtub pan part 3 of a floor part 2 and the whole bathtub is received in configuration. The bathtub drain pipe 4 is connected to the drain port part 5 of the bathtub 1, put through a penetration member 9 arranged on the erected surface 8 of the pan part 3 since a space 7 under the floor between the floor part 2 and also an arrangement surface 6 are reduced, put out to the outer side of a bathroom unit and connected by providing a trap part 10 by which only bathtub discharge water is sealed in configuration. Besides, the air discharge hole 13 is arranged in the pipe 11. Then drain performance is not deteriorated even when the arrangement height of the bathroom unit and the straddling height of the bathtub 1 are reduced so that a user comfortably takes a bath with convenience and excellent drain performance. |
