Armstrong 410133-203 Circulating Pump 704S

Multi-zone heating uses Armstrong 410133-203 704S for residential boiler recirculation and compatible hydronic zone control. Its 1/6 HP, 115 V single-phase motor operates through a three-piece in-line design with a cast iron body and oil-lubricated sleeve bearing. Confirm the 225°F temperature limit, bearing oiling schedule, system curve, and flow direction before startup.

The Armstrong Series 700 704S uses a standard steel or composite impeller within a cast iron circulator body. Its oil-lubricated sleeve bearing requires scheduled maintenance, while the 115 V motor supports compatible residential heating circuits. Verified data does not include GPM, maximum head, amp draw, RPM, seal material, connection size, dimensions, weight, thermal protection, or self-priming capability, so confirm the complete installation requirements before ordering.

Key Features of Armstrong 410133-203 704S

- 1/6 HP motor supports multi-zone residential heating and boiler recirculation.
- 115 V single-phase operation suits compatible residential heating electrical circuits.
- Three-piece in-line design supports serviceable hydronic pump installation.
- Cast iron body provides a rigid housing for residential heating systems.
- Standard steel or composite impeller supports compatible circulation requirements.
- Oil-lubricated sleeve bearing requires periodic maintenance according to approved instructions.
- 225°F maximum operating temperature supports compatible boiler and heating loops.
- Flow, head, amperage, RPM, seal, connections, dimensions, weight, protection, and warranty require confirmation.

Why Choose Armstrong 410133-203 704S

This Armstrong residential heating circulator combines compact single-phase power with serviceable three-piece construction and oil-lubricated bearings.

- Build: Cast iron, modular in-line construction, and sleeve-bearing design support compatible residential hydronic service.
- Value: Standard 115 V power can simplify replacement work, while proper oiling helps protect bearing operation.
- Audience: Residential HVAC contractors, boiler technicians, hydronic installers, property maintenance teams, and heating service professionals can specify this model.

Applications & Use Cases

Use the Armstrong 410133-203 704S for multi-zone residential heating, boiler recirculation, hydronic loops, and compatible small heating systems. Physical dimensions, unit weight, and connection reach were not supplied, so verify pipe spacing, valve clearance, bearing access, motor wiring, lifting room, and installation orientation before installation.

Warranty & Support

- Warranty: Armstrong USA general terms provide 12 months from installation, not exceeding 18 months from shipment, for applicable non-E.2 products.
- Confirm voltage, purge trapped air, lubricate the sleeve bearing, inspect the seal, and verify flow direction during commissioning.

Clean strainers, monitor the cast iron body for leakage, and inspect the bearing and impeller during scheduled service. Purchase the Armstrong 410133-203 704S residential hydronic circulator from Mulmotor.com for authentic equipment, applicable factory warranty protection, and pump support.