Bell Gossett Bg 118473 Spring Type Coupler Pump

Product Description

The BELL GOSSETT BG 118473 is a spring type coupler designed for use in hydronic heating pump systems. It connects the pump motor shaft to the impeller shaft, transmitting rotational force while absorbing minor misalignment and shock loads. Sized at 1/2 inch by 1/2 inch, this coupler fits pump models equipped with 5-1/4 inch and 6-1/4 inch impellers. Installation and replacement are typically performed by licensed HVAC technicians or plumbers during scheduled pump maintenance or motor changeout service calls.

This coupler is used in heating system applications where Bell Gossett close-coupled centrifugal pumps are installed. Compatible pump series include the PD-35, PD-37, Series 60 AA, and Series 1522. These pumps are commonly found in residential and light commercial hydronic heating systems, including hot water boiler loops and fan coil circuits. The spring type design accommodates standard in-line and close-coupled pump configurations used in these series.

Key Features

• Spring type construction absorbs shock and accommodates minor shaft misalignment
• 1/2 inch by 1/2 inch shaft interface matches OEM pump and motor shaft sizing
• Compatible with 5-1/4 inch and 6-1/4 inch impeller configurations
• Designed for hydronic heating system pump applications
• Direct OEM-style replacement for supported Bell Gossett pump series

Compatibility

Designed for use with Bell Gossett Series PD-35 pumps, Series PD-37 pumps, Series 60 AA pumps, and Series 1522 pumps (obsolete) equipped with 5-1/4 inch or 6-1/4 inch impellers.

Installation Notes

Installation is typically performed by a licensed HVAC technician or plumber. Before servicing, shut off electrical power to the pump motor at the disconnect and allow the system to depressurize and cool as required by the application. Inspect both motor and pump shafts for wear or corrosion before installing the replacement coupler. Follow applicable local mechanical codes and the pump manufacturer service documentation when performing the repair.