Resideo 390427B Reducer Bushing

The Resideo 390427B Reducer Bushing is a critical industrial fitting designed to facilitate the transition between different pipe schedules in high-demand combustion environments. Engineered for a precise 1/2" NPT to 3/8" NPT reduction, this component is primarily utilized for mounting Honeywell Minipeeper Ultraviolet Flame Detectors and infrared sensors to specialized sighting pipes. It serves as a rugged interface for the C7027 and C7015 Series scanners, ensuring a gas-tight seal and stable optical alignment required for consistent flame supervision.

For technicians performing field retrofits or replacing legacy Fireye UV-2 or Barber Coleman scanners, this 390427B adapter allows for seamless integration of modern flame safeguard controls without re-piping the entire sighting assembly. Its threaded design conforms to NPSM internal requirements, providing a robust mechanical connection that withstands high-vibration and thermal cycling common in commercial burner applications. When managing HVAC burner parts for industrial combustion systems, maintaining proper flame sensor mounting clearance and thread engagement is essential for avoiding nuisance shutdowns and maintaining safety compliance.

• Universal Compatibility: Optimized for the C7027A and C7015A series, enabling fast field installation on 3/8-inch sight pipes.
• Precise NPT Reduction: Ensures a secure 1/2-inch to 3/8-inch transition, maintaining the structural integrity of the ultraviolet flame detector assembly.
• Industrial Durability: Machined to withstand high-pressure ratings up to 5 psi and extreme ambient temperatures in burner management systems.
• Simplified Retrofitting: Perfect for upgrading legacy scanners to current Resideo technology without extensive pipe modifications.

• Is this bushing compatible with the C7027A1080 Minipeeper? Yes, the 390427B is the standard reducer required to mount these detectors to a 3/8" sight pipe.
• Can I use this for high-temperature applications? While the bushing handles typical burner environments, a separate 136733 heat block is recommended if ambient temperatures at the detector exceed 215°F.
• Will this fit 3/4" pipe applications? No, this specific part is designed for 1/2" to 3/8" transitions. For larger sight pipes, a different bushing configuration is required.

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.