One does not need to replace the entire pool pump to gain all the energy savings associated with variable speed. Upgrade any pool by installing the U.S. MOTORS NPTQ165 Neptune Variable Speed TEFC 48Y Square Flange Motor 1.65THP 115/230V 50/60Hz. The Neptune line is a totally enclosed finned aluminum product which provides greater environmental protection than open drip proof motors which can lead to a longer field life. This professional-grade product has a premium efficient design that can help reduce utility expenses associated with operating a swimming pool pump by up to 80% when utilizing the preprogrammed settings on the onboard user interface.