The Extreme™ series line of pumps represent the ultimate in pump performance. Designed with a circuit board and microprocessor, these pumps use cutting edge technology to maximize flow and pressure based on need. Extreme™ Smart Sensor™ Fresh Water Pumps give you an experience of "Just Like Home" flow that you have come to enjoy. Cracking open a single fixture delivers smooth, quiet, water conserving operation. You may also choose to turn up the flow and enjoy a high-pressured shower for "Just Like Home" comfort, even while another fixture is being used. With the Extreme™ Smart Sensor™ 4.0 and 5.7, the power of flow is in your hands, improving the performance of showers, toilets, washing machines, dishwashers and whole-house filtration systems.