Velocity Boiler Works (Crown) 105881-01 Repair Kit 321894-708 provided the flange sizes match

provided the flange sizes match the 32mm or 40mm pipe specifications

Running at a steady 825 RPM

they cannot be resold for safety reasons

This specific mechanical component is a direct-fit solution for the upper valve of Series TC-4 Test-N-Check configurations

Reliable Thermal Protection: Precisely opens at 165°F to prevent heat exchanger damage and closes at 105°F for automatic system reset

Velocity Boiler Works (Crown) 105881-01 Repair Kit 321894-708 provided the flange sizes matchThe Velocity Boiler Works 105881 01 Ignition Electrode Repair Kit is a critical service component engineered for maintaining precise combustion cycles in residential and commercial Crown boiler systems. As a direct OEM Velocity Boiler Works replacement part, this kit resolves common ignition failures caused by carbon fouling, cracked ceramic insulation, or high resistance electrode degradation. A reliable boiler ignition electrode is essential for