Robertshaw 10-391 Spark Plug Adaptor

The Robertshaw 10-391 Spark Plug Adaptor is a mission-critical component designed for high-performance HVAC ignition systems. This heavy-duty ignition electrode adapter provides a secure, low-resistance bridge between standard spark plugs and 1/4" female quick connect terminals. Engineered for durability in demanding heating and refrigeration environments, the 10-391 utilizes high-grade metallic alloys to maintain electrical continuity even under extreme thermal cycling. Its compact geometry is specifically built to fit into the tight cabinet clearances found in modern residential and commercial furnaces. By utilizing this genuine Robertshaw replacement part, technicians can ensure reliable pilot burner spark generation and prevent intermittent ignition failures caused by corroded or loose terminal connections. This adapter is a staple for contractors maintaining CP-2 series equipment, offering a direct technical solution for converting threaded spark connections to rapid-service spade terminals without sacrificing signal integrity.

• Universal Compatibility: Seamlessly converts spark plug terminals to 1/4" female quick connect spade fittings for faster field servicing.
• Rugged Construction: Built with high-conductivity materials to withstand the high-voltage demands of HVAC spark ignition.
• Precise Fit: Includes a threaded nut to ensure a vibration-resistant, gas-tight bond on the electrode assembly.
• Compact Profile: Ideal for ignition control retrofits where space between the burner and manifold is limited.

What equipment is the Robertshaw 10-391 compatible with?
This adapter is specifically engineered for use with Robertshaw CP-2 model spark electrodes and is a standard component in many gas-fired heating applications requiring a transition to quick-disconnect wiring.

Does the 10-391 include mounting hardware?
Yes, each unit comes standard with a threaded nut to secure the adapter to the spark plug post, ensuring a stable electrical path for the ignition spark.

Can I use this for refrigeration pilot systems?
Absolutely. The 10-391 is rated for both heating and refrigeration units that utilize a spark-to-pilot ignition sequence requiring 1/4" terminal leads.

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.