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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.
To be ADA compliant, every fixture in the bathroom, including the sink, must be accessible to a person in a wheelchair. This places limits on the height of the sink and its position on the counter. An ADA-compliant sink must have knee space underneath it, and the pipes must be protected, either by padding them with insulation or by installing a protective cover. 1  Sink Height -- The maximum distance from the floor to the highest point on the sink cannot exceed 34 inches.