Pool Pumps Why Buy an Energy-Efficient Pool Pump? Pool pumps re-circulate water through a filter to maintain water clarity and hygiene. All swimming pools have at least one pump, but many have multiple pumps. Many swimming pool owners don’t realize how much energy and money their pool pump could be wasting. ENERGY STAR® certified pool pumps can save you up to $2,800 over their lifetime and pay for themselves in less than two years. They also run quieter and prolong the life of your pool’s filtering system. Certified in-ground pool pumps use up to 65 percent less energy than standard models and can save up to $450 a year in energy bill costs.