Laing 10-0102-K Pump,Laing Circ,Series E5,115v/230v,3/4"b,w/4ft Cord,OEMNon-OEM replacement for all models of Watkins Silentflo circulation pumps used in Hot Spring, Tiger River & Limelight spas from 1986 to 2012. The Laing Series E5 circulation pump is compact and lightweight, less than 5 lbs. It is whisper quiet and highly efficient using only 50 Watts of power. The Laing Series E5 is specifically designed for water circulation and is rated for temperatures up to 140° F and line pressure up to 50 PSI. It is equipped with a high density ceramic bearing ball and a carbon graphite bearing cap that allows for continuous operation. Embedded microprocessor control gives protection against dry run conditions. Made with 3/4"barb inlet/outlet and equipped with a 4ft power cord. This pump can be used to replace the discontinued Laing SM-303 (E3).