UPS15-58FRC wet-rotor, stainless steel circulator pump with a 1/12 HP, 115v, single phase, 1-speed motor for hydronic heating in closed loop systems. Flange gaskets are included, but flanges are sold separately. Grundfos UPS Series pumps feature a 3-speed motor, allowing users to adjust the pump speed to fit their specific application. Ceramic bearings ensure years of quiet, trouble-free operation, and quick-connect terminals provide easy installation.