this is specifically a 3/4" sweat connection

and Keeprite brand families

this valve body is designed to interface with various Johnson Controls actuators

This part is a direct replacement for the original Trane GKT3081 and is often interchangeable with the newer part number GKT03081

Lennox 44L65 Limit Switch 320735-701 this is specifically a 3/4"The Lennox 44L65 Limit Switch is a critical safety component designed for precise thermal regulation within residential gas furnaces and air handlers. Engineered as a 160 185F AUTO limit switch, this normally closed (NC) thermal sensor monitors heat exchanger temperatures to prevent overheating and potential component failure. Functioning as a high limit safety cut out, the 44L65 features an automatic reset mechanism that restores the circuit once