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Armstrong 3/4 hp circulating pump, flange connections, 13 1/2 in face-to-face, silver finish

Armstrong Pumps

Armstrong Pumps 116476LF-133 3/4 hp 115/230V circulating pump

SKU CH-P44F-K9M8F

3/4 hp circulating pump moves up to 100 gpm at 1 ft head for potable water systems

  • Delivers up to 100 gpm at low head for rapid hot water circulation
  • Provides 85 gpm at 10 ft head ensuring strong flow in typical systems
  • Maintains 80 gpm at 15 ft head for consistent performance under load
  • Reaches 46 ft maximum head to overcome vertical distance in multi-story buildings
  • Operates on 115/230V single-phase power for flexible electrical installation

3/4 hp hot water circulating pump

The Armstrong 116476LF-133 is a single-speed 3-piece circulating pump rated at 3/4 hp for 115/230 V single-phase supply. It fits a 1 1/2 in intake with flanged connections and a 13 1/2 in face-to-face dimension, making it suitable for potable water systems in residential or light-commercial hydronic loops. The flange or union is included for direct installation.

Replaces older single-speed circulators

This unit replaces a worn or undersized single-speed circulator when the system demands up to 46 ft of head and flow rates of 100 gpm at 1 ft, 85 gpm at 10 ft, or 80 gpm at 15 ft of head. The jump is worth it when the existing pump cannot maintain those flow points or when a flange-mounted 3-piece design simplifies service access compared with an integral-body unit.

Capacity and headroom

The pump comfortably handles closed-loop hydronic circuits that operate within the published head and flow envelope, delivering up to 100 gpm at low resistance and maintaining 80 gpm at 15 ft of head. It runs out of headroom beyond 46 ft of head, so systems with higher static lift or restrictive piping will require a larger-horsepower or multi-speed alternative.

Highlights

  • Delivers up to 100 gpm at low head for rapid hot water circulation
  • Provides 85 gpm at 10 ft head ensuring strong flow in typical systems
  • Maintains 80 gpm at 15 ft head for consistent performance under load
  • Reaches 46 ft maximum head to overcome vertical distance in multi-story buildings
  • Operates on 115/230V single-phase power for flexible electrical installation

Specifications

BrandARMSTRONG

Questions about this item

What is the face-to-face dimension of the Armstrong 116476LF-133 pump and will it fit my existing piping?

The pump has a 13 1/2 inch face-to-face dimension and uses a flange connection with a compatible 1 1/2 inch intake pipe size; flanges or unions are included for installation.

How do I wire the dual-voltage motor on the Armstrong 116476LF-133 and what is the common mistake?

The single-phase motor runs on 115V or 230V AC; verify the nameplate voltage setting matches your supply before wiring, as incorrect voltage selection is the frequent error.

Which parts of the Armstrong 116476LF-133 will need replacement over time in a potable water system?

As a 3-piece circulating pump approved for potable systems, the motor assembly, seal kit, and impeller are the primary components that typically require periodic maintenance or replacement.

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