182212-669 Armstrong E33.2 2″ Cast Iron Circulating Pump

182212-669 Armstrong E33.2 2″ Cast Iron Circulating Pump. Armstrong E Series high efficiency circulators are perfect for heating or cooling applications such as Hot Water, Geothermal, Radiant Panel and Snow Melting in Large Residential and Light Commercial installations. The advanced motor technology and efficient hydraulic design of the E Series yield an overall efficiency that’s up to 41% better than competitive pumps of similar power.