- 3/4 hp 115/230 Volts Armstrong Circulator Pump 3" Model S-57
- Replaces Bell & Gossett Series 100 Model PD-37S
- 3" Flanged
- Standard Three-Piece Design; Cast Iron; Flange Not Included
- 1 Year Manufacture Warranty
Both S and H Series circulators feature the unique Armstrong shaft and bearing module for ease of serviceability and maximum interchangeability. Oversized shafts of alloy steel machined to exact tolerances. Impellers are constructed from non-ferrous material and are designed for optimal water delivery. Typical Applications: Hot Water Boiler & Booster Pumps.