Watts 0121428 Valve Els PW 29614 Dual Part Number Recognition: Fully

Dual Part Number Recognition: Fully interchangeable with Lennox part 74P7001 for simplified inventory management

Simplified Field Service: Pre-formed components allow for faster assembly and maintenance compared to manual field-bending of tubing

While technically a line-voltage control

Common Questions & Technical Insights: What is the primary application for an "Open High" switch

Versatile Electrical Compatibility: 120/240 Volt AC contact ratings support a broad range of commercial fan speed control and fan cycling tasks

Watts 0121428 Valve Els PW 29614 Dual Part Number Recognition: FullyThe Watts 0121428, professionally recognized as the 40XL 7 150 or LF40XL7 150 1, is a heavy duty T&P relief valve engineered for high capacity commercial water heater protection. This 1 inch NPT temperature and pressure relief valve features an extended 7 inch thermostat element, ensuring precise thermal sensing in thick walled tanks or insulated vessels. Rated for a steam discharge capacity of 2,134,000 BTU hr, it is a critical safety component for