Taco 008-VDTF6-1 Variable Speed Delta-T Cast Iron Circulator Pump Standard high capacity output compact design - quiet, efficient operation Unique replaceable cartridge Design-Field Serviceable - direct Drive-Low power consumption Self-Lubricating - no mechanical seal - unmatched reliability --maintenance free Universal flange-to-flange Dimensions - cast iron or Bronze construction This product runs using a 0.025 (1/40) horsepower motor