Nonstock h24-30 Flexible Spring Circulator Coupling

Product Description

The NONSTOCK h24-30 is a Spiralink flexible spring circulator coupling designed as a permanent replacement for the standard 4-spring coupling found on hydronic circulator pumps. The single-spring, one-piece design functions as a universal joint with 3-dimensional flexibility, compensating for shaft misalignment without the connecting parts that create friction, noise, and premature wear. By reducing torque load on bearings and seals, the h24-30 also helps protect bearing assemblies from damage caused by broken coupling components. Licensed plumbers and HVAC technicians working on hydronic heating systems are the primary installers.

This coupling is suited for residential and light commercial hydronic heating systems where circulator pump couplings require replacement. It is designed to fit B and G circulators and compatible units from Armstrong, White-Rogers, Taco, and similar manufacturers. The one-piece construction makes installation straightforward, including in tight or awkward equipment locations where multi-piece couplings are difficult to seat correctly.

Key Features

• Single-spring design eliminates loose connecting parts that cause noise and friction
• 3-dimensional flexibility compensates for shaft misalignment in any direction
• Protects bearing assemblies from damage caused by coupling failure
• Reduces torque load on bearings and seals, extending service life
• One-piece construction simplifies installation, especially in confined spaces
• Permanent replacement for failure-prone 4-spring fly-away style couplings

Compatibility

Designed as a replacement coupling for B and G circulators and compatible units manufactured by Armstrong, White-Rogers, Taco, and similar circulator pump brands using the standard 4-spring coupling as original equipment.

Installation Notes

Installation is performed by a licensed plumber or HVAC technician servicing a hydronic heating system. Shut down the circulator pump and allow the system to de-energize completely before removing the old coupling. Inspect the pump and motor shafts for wear or damage before installing the new coupling. Follow the pump manufacturer's service documentation for any torque or alignment requirements specific to the unit being serviced.