Compact footprint maximizes rail space

Direct Cross-Reference: Engineered as the official replacement for 2420-003

Restoring the internal seal prevents moisture from reaching the 2-wire or 3-wire motor assemblies

providing a hard break in the safety circuit when internal plenum temperatures exceed the factory-defined threshold

White-Rodgers F89-0148 Well Compact footprint maximizes rail spaceThe White Rodgers F89 0148 is a professional grade immersion well designed for seamless integration with hydronic control systems. Engineered with a 1 2" NPT standard shank, this well provides a robust pressure sealed interface between the system fluid and the temperature sensing bulb, preventing leaks while ensuring high thermal conductivity for precise response times. This model is specifically sized for hydronic controls requiring a bulb dimension