Kitchen, Undermount Sink, and Pendant Lighting As the name implies, undermount sinks are attached to the underside of a countertop, where special clips ensure the sink stays in place or the sink is supported from underneath by the base cabinet structure.  Photos from A Midcentury Modern Renovation Opens Interiors and Admits More Sunlight

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As the name implies, undermount sinks are attached to the underside of a countertop, where special clips ensure the sink stays in place or the sink is supported from underneath by the base cabinet structure.