Cornell Pump's Duraprime® pumps are perfect for construction and rental applications and are available in 3", 4", and 6" models. These pumps are built to last, with a durable design and efficient operation. The Duraprime series comes with the Cycloseal® sealing system and Venturi Prime priming system, making it easy to operate and maintain. The Duraprime® series is known for its low operating costs and high efficiency, with a rating of up to 82%. It is also easy to service, with a rebuildable pump design and no need for seal venting or flushing. Cornell offers a two-year warranty on Duraprime® pumps.