1/25 HP 3 Speed Cast Iron Circulator Pump (Astro 2- Series, Model 230CI)

SKU: 3704


The Astro 2- series circulators are designed for quiet operation and zero maintenance. In combination with cast iron volutes the Astro 2 line is intended to circulate water or ethylene-glycol solutions in closed hydronic or solar heating systems.

9 in stock

  • Cross-reference information is printed on the box, for convenient access
  • e-Coating on the inside of cast-iron volutes provides enhanced corrosion protection for improved reliability
  • Flange-to-flange compatibility offers quick and easy exchange of competing models
  • Large wiring box and convenient plug-in terminal strip save time
  • High-flow check valve, is pre-installed for convenience. Where the installation does not call for a check valve, it can be removed in seconds
  • Max. fluid temperature: 230°F
  • Max. working pressure: 150 psi
  • Certification: etl listed for US and Canada (conforms to ul std.778 certified to csa std. c22.2 no.108-01) nsf 372 (for lead free bronze and stainless steel models)
Weight 8 lbs
Horse Power




Max Head (ft.)


Max Flow (GPM)



Installation Instructions (Astro 2, 3-speed circulator models), Specifications Astro 2 – Series


Installation Instructions (Astro 2, 3-speed circulator models)
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Specifications Astro 2 - Series
Download PDF