The UP15-29SU is the perfect pump for domestic hot water recirculation. Provides flows up to 20 GPM and head just below 10. With 1 threaded union connection and terminal box electrical connection. The pump is of the canned rotor type, i.e. pump and motor form an integral unit without shaft seal and with only 2 gaskets for sealing. The bearings are lubricated by the pumped liquid.