| 摘要 |
A toilet ventilation unit including a vacuum motor mounted in the wall voids surrounding the toilet that is connected to the back of the tank and utilizes the water passageway of a conventional toilet to draw odors and aromas from the toilet. A vacuum shut off valve is mounted adjacent the back of the tank and is actuated concomitantly with the rising and lowering of the water level to cut off the air flow from the toilet. An additional valve is also mounted adjacent the tank to act in opposition to the shut-off valve and provide relief from the vacuum created from the drop of the water level during flushing. A release valve is adjacent the vacuum motor to draw air from an air source alternative to the toilet, when the shut-off valve is activated.
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