Old-Style Natural Gas Pilot Assembly 4021-728 / 25731

Old-Style Natural Gas Pilot Assembly 4021-728 / 25731

Replacement old-style natural-gas pilot assembly for specified older Heatilator fireplaces. The current replacement reference is 4021-728, replacing the earlier 25731 number.

Key Features

• Old-style natural-gas pilot assembly for specified Heatilator fireplaces.
• Replacement reference 4021-728, formerly 25731.
• Includes thermopile, spark electrode and pilot tubing.
• 24-inch length for the matching pilot configuration.
• Verify the appliance date code and fuel type; not for later or propane versions.

Specifications

• Product Type: Old-style pilot assembly
• Replacement Reference: 4021-728
• Earlier Reference: 25731
• Fuel Type: Natural gas
• Length: 24 inches
• Included Components: Thermopile, spark electrode and pilot tubing
• Package Contents: 1 natural-gas pilot assembly including thermopile, spark electrode and pilot tubing.
• SKU: SO-FP0630

Compatibility

Use only in a natural-gas appliance specifying this old-style pilot. Match the original pilot number, mounting arrangement and appliance date code. Do not substitute it for a later pilot, an IPI pilot or a propane assembly.

Cross Reference

• Heatilator / HHT: 4021-728 / SRV4021-728 / 25731 / SRV25731

Fireplace Models

• Heatilator GC300FL; requires SRV4021-728; Natural gas; before date code 21/96.
• Heatilator GC300ST; requires SRV4021-728; Natural gas; before date code 21/96.
• Heatilator GC150; requires SRV4021-728; Natural gas; before date code 39/95.

These are selected applications, not a complete compatibility list. Match the specified part number and the appliance's model, fuel type and production revision before ordering. All listed date-code and serial-number limits apply.

Important Note

This is a special-order item. Confirm availability and lead time before ordering. Installation and setup should be performed by a qualified technician following the appliance manufacturer's instructions.

Why Choose This Replacement?

This assembly combines the thermopile, spark electrode and pilot tubing in the specified old-style configuration. The pilot reference and appliance date code are essential to selecting the right version.