Grundfos 96405451 UPS Capacitor Service Kit. The UPS Series Circulating Pumps are designed to be extremely efficient, and durable. The UPS Series Pumps motors are engineered for use on both full and part-capacity systems. The Grundfos 96405451 UPS Capacitor Service Kit is manufactured to cover a broad range of both commercial and residential circulation applications. These circulation applications include; circulating liquids in heating and air-conditioning systems, general water supply, boiler/hydronic heating, and chilled water systems. The Grundfos 96405451 UPS Capacitor Service Kit is a genuine replacement capacitor designed to keep your UPS Circulation Pump performing at the highest levels possible.