Taco pumps refer to a brand of pumps manufactured by Taco Comfort Solutions, a company that specializes in various heating, cooling, and plumbing systems for residential and commercial applications. Taco pumps are commonly used in hydronic heating systems, which use water to transfer heat in buildings. These pumps play a crucial role in circulating hot water from a boiler to radiators, baseboard heaters, or other heat distribution devices throughout a building.