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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.
However it also has a smaller overhang. Consequently I need to make the hole about Â¾ (20mm) wider and about â(10mm) deeper. If I keep the sink centered that means cutting back â(10mm) and 3/16 (5mm) from each side. This will have to be done with the worktop in place and from the top. am replacing my kitchen sink. The existing sink sits in a rectangular hole (with rounded corners) in the kitchen worktop. The worktop is about 1Â½ (40mm) thick and is made of some kind of particleboard (chipboard) with a laminate top surface. The new sink is about â (10mm) wider and the same depth front to back.