Resideo 390427A Reducer Bushing

The Resideo 390427A Reducer Bushing is a critical fitting for field technicians performing gas valve replacements or retrofitting existing manifolds. This 3/4" x 1/2" NPT bushing is engineered for a precision fit on all Honeywell combination gas controls, ensuring a leak-free transition between different pipe diameters. When your gas manifold piping doesn't match the valve inlet or outlet, this bushing provides a rugged, industrial-grade solution to maintain system integrity. Its robust construction resists the mechanical stresses common in residential heating systems and commercial applications. The 390427A bushing is essential for streamlining HVAC gas line installation, allowing for compatibility with various standing pilot or electronically ignited gas valves. Designed to meet strict tolerances, it handles the standard pressures found in natural gas and liquid propane systems, making it a staple in any service truck’s gas valve accessory inventory.

Key Benefits for Technicians:

• Universal compatibility with the entire range of Honeywell gas controls including SmartValve and VR-series units.
• High-grade NPT threading ensures a secure, airtight seal when used with appropriate pipe sealant.
• Durable 3/4 inch to 1/2 inch reduction enables seamless integration of standard gas lines to compact valve bodies.
• Compact profile allows for installation in tight furnace cabinets or boiler enclosures without interference.
• Resistant to thermal expansion and contraction, preventing leaks during seasonal temperature fluctuations.

Common Installation Questions:

Does this bushing work with liquid propane (LP) applications?
Yes, the Resideo 390427A is rated for use in both natural gas and LP systems when installed according to local codes and manufacturer specifications.

Can this be used on the inlet or the outlet of the gas valve?
It is designed for use on either side of the valve to adapt the gas piping to the specific 1/2" or 3/4" requirements of the combination gas control.

Is specialized thread sealant required for this fitting?
Standard gas-rated pipe dope or yellow PTFE tape should be used on the NPT threads to ensure a permanent, leak-proof connection during HVAC service.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.