174031MF-013 ARMSTRONG 1/12 hp 115V Circulator Pump Model S-25
The Armstrong S-25 MF/BF is a 1/12 HP in-line circulator pump designed for hydronic heating and cooling, domestic water systems, multi-stage zoning, and general industrial service. It serves as a direct replacement for Bell & Gossett Model 106189 Series 100 NFI, Armstrong previous model 174031-013, Grainger 4RD16, and Taco #110 pumps.
Key Specifications
- Horsepower: 1/12 HP
- RPM: 1725
- Voltage: 115 V, 60 Hz
- Amperage: 2.5 Amps
- Bearings: Permanently lubricated ball bearings
Product Features & Fitment
This maintenance-free pump features a stainless steel shaft and a non-ferrous impeller housed in a cast iron, standard three-piece design. It includes a hardware kit with mounting bolts and two rubber flange gaskets; however, the threaded flange is sold separately. The pump must be mounted with the motor and pump in a horizontal position. Note that this pump is not designed for potable water systems and is not compliant with the Safe Drinking Water Act. The Armstrong design allows quick replacement without pipe modifications, making it ideal for retrofit applications.
Cross Reference
- the following models
- Bell & Gossett Pump Model 106189, Series 100 NFI
- Armstrong Previous Models 174031-013
- Grainger 4RD16
- Taco # 110
- Replacement Parts
- 818254-003K • Bearing Assembly - Includes New Impeller
- 812961-111 • 2-3/4" Impeller
