The York S1-025-35381-000 Limit Switch is a critical HVAC safety control designed to monitor internal plenum temperatures and protect the heat exchanger from thermal stress

If it remains open after cooling and pressing the reset button

By reducing internal friction

this conductance-type level sensor probe provides a reliable electrical path for detecting water levels in high-pressure steam and hot water boiler systems

Whether you are performing a routine inspection or troubleshooting a pressurized system

Robertshaw 700-522 Gas Valve Els PW 29614 The York S1-025-35381-000 Limit SwitchThe Robertshaw 700 522 is a professional grade 1 inch NPT gas valve designed for high capacity applications, delivering up to 720,000 BTU. This millivolt diaphragm gas valve is a versatile solution for contractors servicing a variety of commercial and residential systems, including large furnaces, boilers, and swimming pool heaters. Engineered for a 3. 5" WC natural gas set point, this unit is also field convertible for LP applications using the