Williams Comfort Products ISFXTM613 Thermocouple Extension

Product Description

The WILLIAMS COMFORT PRODUCTS ISFXTM613 is a flexible thermocouple extension designed for use in gas-fired heating appliances. It measures 6 inches in length with a 13mm, 3/8-inch square fitting configuration. This component extends or replaces the thermocouple lead assembly in standing-pilot gas heaters and wall furnaces, allowing the sensing element to reach the pilot flame without rigid routing constraints. HVAC technicians and gas appliance service professionals install this part during thermocouple replacement or pilot assembly repair.

This flexible thermocouple extension is suited for residential and light-commercial gas heating applications, including wall heaters and vented room heaters that use standing-pilot ignition systems. Its flexible construction allows for routing in tight spaces where a rigid thermocouple lead cannot be properly positioned. It is sold individually and is intended for professional installation in equipment requiring a 13mm, 3/8-inch square thermocouple connection.

Key Features

• 6-inch flexible extension for routing in confined pilot assembly areas
• 13mm diameter with 3/8-inch square fitting for secure thermocouple connections
• Flexible construction accommodates non-linear routing without kinking
• Sold as a single unit, sized for direct replacement in compatible pilot assemblies
• Lightweight at 0.52 pounds for easy handling during service calls

Compatibility

Designed as an OEM-style replacement thermocouple extension for gas-fired wall heaters and room heaters using standing-pilot ignition systems with 13mm, 3/8-inch square thermocouple connections.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified gas appliance service professional. Shut off the gas supply and allow the appliance to cool completely before servicing the pilot assembly or thermocouple components. Ensure all connections are snug and free of cross-threading before restoring gas flow. Follow all applicable local gas codes and manufacturer service procedures when replacing thermocouple components.

Technical Specifications

• Length: 6 inches
• Fitting Size: 13mm, 3/8-inch square
• Weight: 0.52 pounds
• UPC: 662459334954
• Sold As: Each

Standard Information

• Brand: WILLIAMS COMFORT PRODUCTS
• Manufacturer Part Number: ISFXTM613