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Pump High Efficiency 4" - 100-120F High Flow

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$4,975.05 $4,477.54
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  • High-flow performanceDesigned for high-flow hydronic systems across a 50°F to 180°F operating range.
  • ECM variable-speed motorHigh-efficiency operation with adjustable speed and 40–650W power draw.
  • 208–230V compatibilityDirect connection to boilers and heat pumps on standard commercial voltage.
  • Grundfos MAGNA3 replacementDirect replacement for Grundfos MAGNA3 50-120F (98126844).
  • Complete installation packageIncludes 2" NPT flanges, stainless hardware, and body insulation.

High Efficiency Pump 2"

Main features

  1. High Flow Performance

    Designed for high-flow operation in large hydronic systems across a wide operating temperature range.

  2. ECM Variable-Speed Motor

    High-efficiency variable-speed ECM motor reduces energy consumption based on system demand.

  3. Direct System Integration

    Compatible with 208–230V systems for direct connection to boilers and heat pumps.

  4. Complete Installation Package

    Includes NPT flanges, stainless hardware, and pre-mold body insulation to reduce heat loss.

  5. Direct Grundfos MAGNA3 Replacement

    Drop-in replacement for the corresponding Grundfos MAGNA3 model for straightforward system upgrades.

  6. Flexible Sizing Options

    Available in multiple flange sizes with single or series configurations to match varying system capacity requirements.

High efficiency pump 2" high flow overview
High efficiency pump 2" high flow installed

Variable-Speed Operation

ECM motor continuously adjusts speed to match system demand, minimizing energy use without sacrificing flow.

System Compatibility

Designed for 208–230V systems for direct connection to boilers and heat pumps.

Installation Components Included

Supplied with NPT flanges, stainless hardware, and pre-mold body insulation for straightforward installation.

Application Sizing

Available in single or series configurations to match system capacity requirements — see product description for model-specific guidance.

Installed in real homes and workshops

Customer Success Stories

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Technical specifications

Common specifications for the High Efficiency Pump series. Size, capacity, and temperature range vary by model — see the product description for model-specific details.

Available Sizes 2", 2-1/2", 3", 4"
Voltage 208–230V
Motor Type ECM variable-speed
Power Consumption 31 to 1263W (varies by model)
Operating Temperature 50°F to 180°F (varies by model)
Included NPT flanges, stainless hardware, pre-mold body insulation
Compatible Replacement Grundfos MAGNA3 (model-specific)
Sizing Single or series configurations — see product description for model-specific guidance

Use a family-specific bottom-tabs section later if this product needs comparison tables, grouped specs, or product-handle logic.

Product documents

Product documents will be added here when available.

Product details

Pump High Efficiency 4" - 100-120F High Flow

High-flow flange circulator pump for 208-230V systems, designed for large hydronic loops with efficient variable-speed operation (100°F to 120°F range).

 

Key Benefits

  • Includes 4" NPT flanges and stainless hardware
  • Direct replacement for Grundfos MAGNA3 100-120F
  • Direct boiler/heat pump connection (208-230V)
  • Includes pre-mold body insulation to reduce heat loss
  • Variable-speed ECM operation for energy savings

 

Specifications

  • Thread Size: 4"
  • Motor: 2 HP
  • Voltage: 208-230V
  • Capacity: 150 to 250kW
  • Power Consumption: 40 to 650W
  • Sizing Guide: 1x pump for 4x APOLLO 5-6T / UNI 150-300 / Pellet 150-300 / EKO 150-300 / HARD-BIO 150-300; 2x in series (up to 500kW) for 8x APOLLO 5-6T / UNI 300-500 / Pellet 300 / EKO 300 / HARD-BIO 300

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