Lochinvar & A.O. Smith 100166238 Switch 328140-751 This switch is calibrated to

This switch is calibrated to open or close at specific WC (water column) setpoints

Visible moisture around the top of the valve bonnet or resistance during stem travel often indicates that the valve stem seal has degraded and requires a new packing maintenance kit

This multi-probe fixture features a rugged cast iron body and a die-cast aluminum terminal housing finished with a chemical-resistant epoxy coating

Each 383-500-650 kit includes the blower housing

It maintains the same 48 frame motor specifications and electrical requirements for a seamless swap

Lochinvar & A.O. Smith 100166238 Switch 328140-751 This switch is calibrated toThe Lochinvar & A. O. Smith 100166238 Gas Pressure Switch is a critical safety component designed for high performance gas fired boilers and commercial water heaters. Featuring a 1 20" WC adjustable range, this manual reset gas pressure switch ensures system integrity by monitoring incoming or manifold gas pressure. If pressures deviate from the calibrated setpoint, the switch initiates a safety lockout, preventing hazardous combustion conditions.