| 摘要 |
A drain plug for controlling the flow of a liquid through a drain hole. The drain plug has a drain plug body with a drain passage extending partly through the drain plug body. The drain passage has at least one outlet port. The drain plug has a check valve for allowing the flow of the liquid through the drain passage in a first direction and substantially inhibiting the flow of liquid through the drain passage in a second opposite direction. The drain plug is moveable relative to a drain hole between at least one open position in which the at least one outlet port is exposed or open and liquid may flow through the passage and at least one closed position in which the at least one outlet port is covered or closed by the drain hole housing to substantially inhibit liquid flowing through the passage.
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