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Armstrong Astro 2 circulating pump, flange connection, single-phase motor, new condition

Armstrong Pumps

Armstrong Pumps 110223-321 Hot Water Circulating Pump 5/16 hp 115V Single Phase Flange

SKU CH-FEYR-80XMQ

A multi-speed circulating pump for potable water systems delivers up to 32 gpm at 1 ft head and 31 ft maximum head on 115 V single-phase power

  • Delivers up to 32 gpm at 1 ft head for strong circulation
  • Three-speed motor lets you match flow to system needs
  • 5/16 hp single-phase 115V motor runs on standard household power
  • Flanged connection with 6-1/2 in face-to-face dimension simplifies installation
  • Rated for potable water systems for safe domestic hot-water use

Armstrong Astro 2 Hot Water Circulator

The Armstrong Astro 2 is a flange-connected circulating pump rated at 5/16 hp for 115V single-phase supply. It suits residential hot-water recirculation loops where a compact, multi-speed unit is required. Buyers needing higher head or flow for commercial hydronic systems should look elsewhere.

Flange Mounting and Three-Speed Setup

The pump bolts to standard 1 1/4 inch flanged piping with a 6 1/2 inch face-to-face dimension and includes the flange hardware. Installation is straightforward for plumbers familiar with flange alignment; the only common issue is forgetting to verify gasket seating before tightening.

Flow Performance and Head Limits

At 1 foot of head the pump delivers up to 32 gpm, falling to 24 gpm at 10 feet and 19 gpm at 15 feet of head. Maximum shut-off head reaches 31 feet, so circuits demanding more pressure will exceed its capability.

Highlights

  • Delivers up to 32 gpm at 1 ft head for strong circulation
  • Three-speed motor lets you match flow to system needs
  • 5/16 hp single-phase 115V motor runs on standard household power
  • Flanged connection with 6-1/2 in face-to-face dimension simplifies installation
  • Rated for potable water systems for safe domestic hot-water use

Specifications

BrandARMSTRONG

Questions about this item

How can I verify the pump is operating correctly after installation?

Check that water circulates and measure flow at the 10 ft head mark; it should reach 24 gpm, or 19 gpm at 15 ft head, with the 3-speed selector set to the desired speed.

What components come in the box and what must I supply?

The pump includes the flange connection; you must provide 1 1/4 in intake piping and a 115V single-phase power supply.

Which model variant should I choose for my system?

This Astro 2 series unit (110223-321) delivers 5/16 hp, 31 ft max head and three speed settings; select it when those ratings match your design requirements.

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