Abstract: A liquid dispenser for a sink is disclosed which includes a pump assembly with a reciprocatable pump head and a dispensing nozzle. A mounting fixture is adapted to be attached to the sink and configured to support the pump assembly. A fluid line is attached to the pump assembly and adapted to channel a fluid from a dispenser bottle to the dispensing nozzle. The fluid line has a length that permits the dispenser bottle to be located on the base of a cabinet supporting the sink. A check valve is positioned within the fluid line and adapted to inhibit fluid flow along the fluid line in a direction toward the dispenser bottle when the fluid line is attached to a dispenser bottle. A kit is also disclosed for modifying a standard liquid dispenser to permit use of conventional soap or lotion bottles.