Check the listing for details. Bell & Gossett LHB08100104 LF Brass Ecocirc Circulator w/Multi-Speed (1/2"NPT). Condition: New. Listed at 236.55 USD. Bell & Gossett LHB08100104 LF Brass Ecocirc Circulator w/Multi-Speed (1/2"NPT) Energy Efficient Due to ECM Technology:The ecocirc pumps' highly efficient ECM (Electronically Commutated Motor) design results in significant energy savings with improved performance: Through microprocessor technology the motor is provided the precise frequency and voltage for optimum performance. A permanent magnet motor eliminates the requirement for input power to magnetize the rotor, thus maximizing efficiency. This unique design offers superior starting torque when compared with the standard induction motor type pumps. The Spherical Motor Design:The only moving part of this pump type is a spherical motor/impeller unit which is suspended on an extremely wear resistant ceramic ball. Shaft seals or conventional bearing bushings with a shaft have been eliminated. The only self realigning bearing in the small pump market has many advantages:-The suspension on a ball eliminates any bearing play, even after years of use.