Armstrong Compass 20-20 Cast Iron (CI) 180203-606

Armstrong Pumps 180203-606 Compass 20-20 CI Variable Speed Circulating Pump - Ships anywhere in the US mainland for just $8!

Optimize fluid circulation and lower your energy costs with the genuine Armstrong Pumps 180203-606 Compass Circulating Pump. This high-efficiency, multi-purpose wet rotor circulator is engineered specifically for residential and light commercial hydronic heating systems, radiant in-floor heating layouts, and chilled water loops. Utilizing advanced sensorless technology, the Armstrong 180203-606 automatically adapts its variable speed output to match fluctuating system demand, ensuring maximum home comfort while slashing electrical consumption.

Constructed with a heavy-duty cast iron body, this pump features a standard 6-1/2 inch flange-to-flange length and adapts to flange sizes ranging from 3/4 to 1-1/2 inches, making it an incredibly versatile drop-in solution for new construction or field replacements.

Technical Specifications:

  • Model/Part Number: 180203-606 (Compass 20-20CI)
  • Body Material: Cast Iron
  • Connection Type: Flanged (Fits 3/4" to 1-1/2" Flanges)
  • Flange-to-Flange Dimensions: 6-1/2 Inches
  • Horsepower: 1/8 HP
  • Voltage/Frequency: 115 VAC / 60 Hz (Single Phase)
  • Speed Profile: 3 Manual Speed Settings plus Auto Variable Speed
  • Max Flow Capacity: 20 GPM @ 0 Feet of Head
  • Mid-Range Performance: 8 GPM @ 12 Feet of Head
  • Max Shut-Off Head: 20 Feet
  • UPC: 672807420741

Key Features & Benefits:

  • Smart Sensorless Control: Dynamically adjusts motor speed to meet the exact load conditions of your hydronic zones without the need for external pressure sensors or complex wiring, cutting operating energy costs by up to 50%.
  • Simple Digital User Interface: Features a straightforward, front-facing display panel that allows real-time operational monitoring and painless speed or mode adjustments with a single touch.
  • Flexible 3-Speed Overrides: In addition to its intelligent variable speed setting, technicians can manually select between 3 fixed speeds to match the exact requirements of traditional zone-valve or staging applications.
  • Quiet, High-Performance Design: The integrated wet-rotor configuration ensures smooth, whisper-quiet operation beneath floorboards or inside utility closets, eliminating mechanical shaft vibration.

Compatibility & Applications

The Compass 20-20CI is a highly capable fluid management pump suitable for a wide range of closed-loop thermal designs. It is ideal for:

  • Heating Systems: Baseboard radiation, hydro-air coils, multi-zone wood boilers, and sub-floor radiant heating systems.
  • Cooling Systems: Secondary chilled water loops and closed loop fan coil air conditioning units.

Pump Cross-Reference Table

MODELS

ARMSTRONG

PART NUMBER

SPEED

Bell And Gossett

GRUNDFOS

WILO

TACO

Cast iron

COMPASS 20-20 CI

180203-606

Variable 3

Ecocirc Auto / Vario

ALPHA 15-55F/F-LC,


 

ALPHA 15-55FR/FR-LC²

Stratos ECO 16F/RFC,


 

16FX²

Bumble bee (HEC-2)

Cast iron

COMPASS 20-20 CI

180203-606

1

UPS 15-42F S1,


 

UPS 15-58FC S1,


 

UP 15-10F,


 

UPS 26-99FC S1

STAR S 16F S1

Cast iron

COMPASS 20-20 CI

180203-606

NRF-25 ST¹,

NRF-9F/LW²

UPS 15-42F S2,

UPS 15-58FC S2

STAR S 16F S2

STAR S 21F S1

005-F2-3-IFC²,

006-F4/-F7-IFC,

007-F5-5/-8-IFC²,

00R/0015-F61 IFC/-

MSF2-1 IFC S1

Cast iron

COMPASS 20-20 CI

180203-606

NRF-22²,

NRF-25 S2¹

UP 15-42F,

UPS 15-42F S3,

UPS 15-58FC S3,

UPS 26-99FC S1,

UPS 43-44FC S1

STAR S 16F S3,


 

STAR 16F,


 

STAR S 21F S2 & S3

008-F6-1-IFC,


 

00R-F6-1-IFC,


 

00R/0015-MSF2-1 IFC


 

S2 & S3

Stainless steel

COMPASS 20-20 SS

180203-607

Variable 3

ALPHA 15-55SF/SF-LC

Stratos ECO 16BFX²

Stainless steel

COMPASS 20-20 SS

180203-607

1

STAR 5 BU¹, STAR S


 

16BF S1

003-SC4-1/FC

Stainless steel

COMPASS 20-20 SS

180203-607

2

NBF/SSF-9U/LW¹,


 

NBF/SSF-12U/LW¹,


 

NBF/SSF-12F/LW²,


 

NBF-25 S1

UP 15-18BUC 5/7¹,


 

UP 15-29SU¹,


 

UP 15-35SUC,


 

UPS 15-35SUC S2¹,


 

UPS 15-35SFC S1 & S2,


 

UP 15-18SF,


 

UPS 15-55SFC S1²

STAR 8¹,


 

STAR S 16BF S2,


 

STAR S 21BFX S1

005-BF2/-1-IFC²,


 

005-SF2/-IFC²,


 

006-BC4-1,


 

006-B7-IFC,


 

006-SC4-1,


 

006-SC7-1FC,


 

007-BF5/-1-IFC²,


 

007-SF5/-IFC²

Stainless steel

COMPASS 20-20 SS

180203-607

3

NBF/SSF-22²,


 

NBF-25 S2¹

UPS 15-35SFCS3,


 

UPS 15-55SFC S2 & S3²,


 

UP 15-42SF,


 

UP 25-64SF,


 

UPS 26-99BFC S1,


 

UPS 43-44BFC S1

STAR 11 BU¹, STAR S


 

16BF S3,


 

STAR 16BF,


 

STAR S 21BFX S2 & S3

008-BC6,


 

008-BC6-IFC,


 

008-SF6/-IFC²,


 

00R/0015-SF6-IFC,


 

00R/0015-SF6-1-IFC²

 

Why Buy From Shortys HVAC Supplies?

At Shortys HVAC, we offer top-tier Original Equipment Manufacturer (OEM) and factory-authorized industrial components so your mechanical systems run safely and predictably. Choosing the Armstrong 180203-606 Pump guarantees you get an engineering-grade fluid circulator backed by industry-standard safety ratings and factory performance certifications.

Shipping Information: We provide fast, competitive shipping rates across the continental United States, delivering critical hydronic and climate control components straight to your shop or job site to minimize system down-time.

Please note this pump will ship directly from our Armstrong distributor and may take 4-7 days to arrive.

$296.00

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  • Model: 180203-606
  • Manufactured by: Armstrong Pump
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