Cast Iron Pump Coupler, 1/2 In x 1/2 In

A spring-type cast iron pump coupler designed to connect the motor shaft to the pump shaft in in-line circulator pumps. This replacement component transfers power efficiently from the motor to the impeller while helping maintain proper shaft alignment and smooth pump operation. Constructed from durable cast iron, the coupler is engineered to withstand the demanding conditions of hydronic heating and HVAC circulation systems. Its spring-type design helps absorb minor misalignment and vibration, reducing wear on pump and motor components while promoting reliable operation. The coupler features 1/2 inch x 1/2 inch shaft connections and is commonly used in Series 100, Series HV, Series PR, and various legacy in-line circulator pump models. As a genuine replacement part, it restores proper power transmission and system performance when replacing worn or damaged couplers.

• 1/2 Inch x 1/2 Inch shaft size configuration
• Durable cast iron construction for long service life
• Transfers power from motor to circulator pump efficiently
• Ideal for pump repair, maintenance, and rebuilding applications
• Spring-type design helps absorb vibration and minor misalignment
• Helps maintain proper shaft alignment and reduce component wear
• Compatible with Series 100, Series HV, Series PR, and other Bell and Gossett circulators