Cast Iron Durability: Constructed from high-strength cast iron for improved fatigue resistance compared to sintered or aluminum alternatives

ensuring watertight protection for internal components in demanding environments

though it includes a standard regulator for precision field adjustments by qualified technicians

minimizing downtime for critical heating and cooling loops

Using it on a 120V circuit will result in improper timing or failure of the drive motor

Armstrong Fluid Technology 174036MF-113 Protection 323055-751 Cast Iron Durability: Constructed fromThe Armstrong Fluid Technology 174036MF 113 (Model S 45 BF) is a high performance cast iron circulator pump designed for reliable fluid handling in commercial and residential hydronic systems. This 1 4 HP, 115Vac single phase pump is engineered with a non ferrous impeller and a radially split body, allowing for efficient "back pull out" servicing without disconnecting the main piping. Built for longevity, it features permanently lubricated maintenance