Durable Construction: High-impact plastic housing protects sensitive bimetal elements from physical damage and tampering

Ensure the 24V coil voltage matches your system's control circuit

Common Questions & Technical Support Is the 20403301 a direct substitute for the 20403302

including gas and electric furnaces and heat pump systems

For contractors dealing with frequent water heater or boiler service calls

TB Woods 4JE Insert Durable Construction: High-impact plastic housingThe TB Woods 4JE flange insert is a single piece, solid construction EPDM sleeve specifically engineered for Sure Flex Plus size 4 couplings. This high performance elastomer provides excellent torsional flexibility and is designed to handle angular misalignment, parallel offset, and axial movement in power transmission systems. As a veteran grade elastomeric coupling insert, the 4JE is ideal for applications involving high humidity or atmospheric