Series NBF-22U bronze body small circulator pumps are used for domestic, potable water. NRF-22U pumps are permanently-lubricated with a 1/25 HP, 2940 RPM, 115v, single phase motor. Series NBF pumps are reliable, in-line wet rotor circulator pumps intended to pump potable, domestic water from hot water heater tanks to areas such as bathrooms and kitchens. It's a maintenance-free system, with a self-cleaning particle shield, and DuraGlide bearing systems protects the shaft and bearings from system start-up debris. Series NBF pumps have a Red Fox motor, which features high-starting torque, and a stabilized, heat-resistant, non-metallic impeller with a closed design. Mounting hardware and flange gaskets are included. Connections (sweat or flange) are available separately.