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The most common kitchen counter height is 36 inches, but it can vary from 30 to 45 inches. The standard kitchen sink is 8 inches deep, which means that the normal distance between a kitchen sink drain and the floor is 28 inches. This will vary, depending on the height of the counter and the depth of the sink bowl. In the bathroom, the sink drain is typically between 24 inches above the floor.
At the Elementary level, knee clearance should be 24 inches minimum and sink top should be 29 inches maximum. At the Adult level, knee clearance should be 29 inches minimum and sink top should be 34 inches maximum. The ADA Bathroom Sink Height Requirements include a depth maximum of 6.5 inches. The knee clearance should also have a width of 30 inches and depth of 19 inches. The disabled man should be able to position his wheelchair in front of the sink. ADA even suggests that the faucet handles should be push, lever, touch or motion sensor.