E1-BCTVNN1-06 Laing Circulating Pump with 1/2" Threaded, Non Timer Series Features:Saves 68% electricity compared to a standard circulating pumpHighly efficient ECM Technology Long lasting, silent operation Resistant to scale build up Maintenance free without blockage, extended service life Single bearing design Shaftless and sealless1/2" Threaded/Non Timer SeriesVariable motor controlNo temperature control1110-120 Volts ACNo cord