The Taco Model 0013 cartridge circulator is specifically designed for high-head/high-flow applications in large residential/light commercial systems. Exclusive, Anti Condensate Baffle (ACB) protects motor windings on chilled water jobs. Available in cast iron or stainless steel construction stainless steel should be used on open-loop systems. Unique, "00" family replaceable cartridge contains all of the moving parts so you can service it easily instead of replacing the entire unit. Universal flange-to-flange dimensions and orientation allow the 0013 to easily replace other models.