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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.
Distance between finished wall and center of a floor drain or rough â in might be 10â, 12â or 14â depending on toilet type. But most residential floor mount toilets require one foot (305 mm) drain placement from the back wall. Minimum 15â space should be left between the center of a drain and finished side wall.