High-Efficiency Circulator


Designed for use in potable water systems, the stainless-steel COMPASS R20-75 circulator model features a dry rotor design, as well as advanced variable speed Design Envelope technology, Armstrong iECMTM motors, and quadratic control to minimize both energy costs and long-term operating costs for homeowners.


The innovative quadratic control algorithm offers operating efficiencies that are better than standard variable speed solutions, and even greater system energy savings are possible with the 0-1V dc input signal connection to external systems.


The COMPASS R is a direct performance replacement for nine competing circulator models and a bolt-to-bolt match for many installed circulators.


  • Applications: Residential heating and cooling; potable water supply
  • Materials: Cast iron and stainless steel volutes.
  • Configuration: Eight operation modes with “Auto” algorithm, four Sensorless modes and three fixed speed modes. 50 and 60 Hz designs
  • Performance range: Up to 75 USgpm (4.7 L/s) flow; up to 20 ft (6.1 m) head
  • Temperature: Max ambient temp. 40°C; max water temp. 110°C
  • Power Range: 1/6 hp
  • Size: 2 bolt  - 1.5 in.



  • Optimized hydraulics with a high-efficiency dry rotor design
  • “Posi-start” technology provides smooth starting and automatic de-blocking
  • Onboard control panel for easy selection of the appropriate operations mode and flow
  • Release latch for easy adjustment of the display orientation and repairability
  • Easy-to-access front-facing terminal block with a large wiring chamber
  • Replaceable mechanical seal, and any other circulator part required
  • Complies with EEI<0.22, NSF-372
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