| 摘要 |
PROBLEM TO BE SOLVED: To simultaneously perform a water leakage inspection and a trap gas leakage inspection, by providing a bent drain passage under a ball surface, a space portion surrounded with the drain passage, and a hole in a partition with a space portion communicating with the outside air other than the drain passage adjacent to the space portion. SOLUTION: This closet bowl 1 comprises a rim 2 and a ball surface 3 in its upper part and a bent drain passage 9 under the ball surface 3. A space portion 10 surrounded by the drain passage 9 is adjacent to a space portion 12 communicating with the outside air through a pressurized air supply hole 13 and a blow-off hole 14, and the partition between them is provided with a hole 11. This closet bowl 1 can be formed by casting-molding a frame portion of the closet bowl 1, opening the hole 11, adhering separate compacts (adhering plates) 4, 5, 6, and then baking them. When a crack exists in a wall surface 5 during a water leakage test, water leaks through the hole 11, the pressurized air supply hole 13, and the blow-off hole 14. Therefore, the water leakage inspection and a trap gas leakage inspection can be simultaneously performed.
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