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Wilo - 3-Speed Cast Iron Star Series Circulator, 1/12 HP

Item: STAR21S
MFR: 4090765


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About This Product

Product Info


Wilo - Overview:
Wet rotor circulation pump, with flanged connection. (Flange parallel to shaft). Pre-selectable speeds to adjust the capacity on "S" versions. Cast iron body for hot-water heating systems of all kinds, industrial circulation systems, cold-water systems and air-conditioning systems.
  • Suitable for any installation position with horizontal shaft; terminal box in 3-6-9-12 o'clock position
  • Three pre-selectable speed stages for load adjustment ("S" type only)
  • Impedance protected motor, motor protection not required
  • Cable entry both sides of terminal box
  • Quick connection spring clips for simple electrical connection
  • Steel Terminal Box
  • Fits all Competitor's Models
  • Powerful Starting Torque
  • Ultra Quiet
  • Reliable Wet Rotor Technology
  • Automatically Vented
  • Pump housing: Grey cast iron (EN-GJL200)
  • Impeller: Engineered Composite (PP - 40% GF)
  • Shaft: Stainless steel (Cr)
  • Bearing: Metal-impregnated carbon
Warning: this product contains a chemical known to the State of California to cause cancer.


Weight6.5 Pounds (lbs)
Length5.0667 Inches (In)
Width6.375 Inches (In)
Height6.375 Inches (In)
Country of OriginDEU
Cord LengthConnection cable sold separately. See manual for requirments
Cycle/Hertz50/60 Hz
Gallons Per Hour Of Water1140
Maximum Pressure (PSI)140
Maximum Temperature230°F (110.0088°C)
Motor HP1/12 HP
Prop 65Yes
Voltage115 VAC
Warranty OfferedYes


Equipment Part List

Motor Season