Pilot Assembly – HHT 4021-736 | NG | 24" Tubing | OEM Replacement for 485-510A | Fits Quadra-Fire, Heatilator & Heat N Glo

Pilot Assembly – HHT 4021-736 | NG | 24" Tubing | OEM Replacement for 485-510A | Fits Quadra-Fire, Heatilator & Heat N Glo

Get reliable ignition and long-lasting performance with the HHT 4021-736 Natural Gas Pilot Assembly. This complete OEM pilot assembly includes all essential components to ensure safe and consistent startup of your gas fireplace or stove. Designed for compatibility with a wide range of Quadra-Fire, Heatilator, and Heat N Glo units, this replacement delivers factory-quality performance and dependable ignition every time.

Key Features:

• Complete Pilot Assembly – Includes thermocouple, thermopile, spark igniter, and pilot tubing
• OEM Quality – Replaces part #485-510A with genuine Hearth & Home Technologies components
• 24" Tubing Length – Allows easy installation in a variety of direct vent and insert models
• Reliable Ignition – Built for durability and consistent performance with IntelliFire systems

Specifications:

• Model: 4021-736
• Replaces: 485-510A
• Fuel Type: Natural Gas
• Tubing Length: 24"
• Components Included: Thermocouple, thermopile, sparker electrode, pilot tubing
• Manufacturer: Hearth & Home Technologies (HHT)
• UPC: 652174752591

Compatible Brands:

• Quadra-Fire
• Heat N Glo
• Heatilator

Replaces Part Numbers:

• 4021-736
• 485-510A

Compatible Models Include (but not limited to):

Quadra-Fire: QV32, QV32-A, QV36, QV36-A, QV36D, QV36D-A, QV36DB, QV36DB-A, QVI-30FB, QV-Pier, QV-ST
Heat N Glo: 6000 Series (6000BE, 6000CAMP, 6000SEB, etc.), 7000 Series, 8000 Series, Everest, BAY-INSERT, ST-42TVFL, and many more
Heatilator: ADI60S, ADVR3428, ADVT3428, NDV3630, NDV4236, NDI35-SP, SL-550BE, SL-750TR, ST-CFL-24NG-B, and others

Always confirm size and compatibility by checking your owner's manual or comparing the existing part number.

Why Choose Our Pilot Assembly?

Our OEM HHT 4021-736 Natural Gas Pilot Assembly offers the perfect balance of quality and performance. Each unit is built with durable components to ensure reliable ignition, consistent flame stability, and long-lasting service life. Whether you’re restoring heat to your gas fireplace or upgrading an aging assembly, this replacement part provides dependable performance backed by Hearth & Home Technologies engineering.