Can I use the 157S-MD to replace older mercury switch models

a rebuild kit is the industry-standard solution for fixing common issues like external leaks at the gasket or a valve that fails to open/close due to a worn plunger or broken spring

the 24 VAC solenoid coil (part number 1472553843 often found with this assembly) is removable

The System Sensor D4120W is a high-performance 4-wire photoelectric duct smoke detector specifically engineered for harsh environments and outdoor rooftop HVAC installations

Direct Drive Compatibility: Features a standard 1/2 inch bore for seamless integration with OEM direct-drive motors

Conbraco 24-305-03 Valves 318172-701 Can I use the 157S-MDThe Conbraco 24 305 03 is a high performance liquid level gauge valve engineered for demanding industrial and commercial tank monitoring applications. Constructed from heavy pattern rough bronze, this valve set is designed to provide reliable service in high pressure environments, featuring a 3 4 inch NPT male connection for a secure, leak resistant interface. The internal assembly utilizes a PTFE with Hypalon glass seal and braided PTFE with Aramid