Horsepower (HP) is a unit of power measurement that indicates the rate at which work is performed. In plumbing systems, HP is commonly used to measure the output of pumps, compressors, and other motor-driven equipment. For example, water pumps are often rated in horsepower to specify their capacity to move water against resistance, such as elevation or friction. One horsepower is equivalent to 746 watts or 550 foot-pounds of work per second. Properly sizing equipment based on HP is essential to ensure that it can handle the required flow and pressure demands without overloading or wasting energy. Understanding the HP rating helps in selecting the right equipment for applications ranging from residential well pumps to commercial booster systems.
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