Resideo 390427e/u Reducer Bushings 3/4x1/2 Inch Npt

Product Description

The RESIDEO 390427e/u is a reducer bushing kit designed for use with combination gas controls that have non-standard inlet or outlet sizing. The kit includes two 3/4-inch x 1/2-inch NPT reducer bushings, allowing technicians to adapt gas control valves to piping configurations that do not match the standard 3/4-inch inlet or outlet. This hardware is a common field requirement when servicing or replacing gas valves on residential heating equipment. Installation is handled by licensed gas technicians and HVAC service professionals as part of a gas valve replacement or system commissioning job.

This reducer bushing kit applies to residential and light commercial gas heating systems where combination gas controls require inlet or outlet adaptation. It is particularly useful during gas valve changeouts when the existing supply or manifold piping is 1/2-inch NPT and the replacement control uses 3/4-inch ports. The two-bushing configuration covers both inlet and outlet adaptation in a single kit, reducing the need for separate field-sourced fittings.

Key Features

• Includes two 3/4-inch x 1/2-inch NPT reducer bushings for inlet and outlet adaptation
• Compatible with combination gas controls that do not have a 3/4-inch inlet or outlet as standard
• NPT threading provides a standard, field-reliable connection for gas piping
• Compact kit format reduces sourcing time during gas valve replacement jobs

Compatibility

Designed for use with all combination gas controls that do not have a 3/4-inch inlet or outlet. Consult the gas control manufacturer documentation to confirm thread engagement and pressure rating before installation.

Installation Notes

Installation must be performed by a licensed gas technician or HVAC professional in accordance with local codes and IFGC requirements. Shut off the gas supply and verify zero pressure at the valve before removing any fittings. Apply an approved thread sealant rated for gas service to all NPT connections. After installation, perform a leak check using an approved gas leak detection solution before returning the system to service.

Technical Specifications

• Connection Size: (2) 3/4 inch x (1) 1/2 inch NPT
• Thread Type: NPT
• Origin: Import

Standard Information

• Brand: RESIDEO
• Manufacturer Part Number: 390427e/u