For Instant Hot Water Recirculating SystemsSM-303-BSMT-303-BSM-909-B-14SMT-909-B-14with 24 hour timerwith 24 hour timerUC-303-BUCT-303-Bwith 24 hour timerAbout LAING Pumps Laing Recirc® pumps have only one moving part-the rotor/impeller. The motor creates an electromagnetic field ...