Lochinvar & A.O. Smith 100277756 LWCO Probe 328140-751 Designed for high compatibility with

Designed for high compatibility with residential gas water heaters

The integrated vent limiting orifice eliminates the need for external vent piping in most jurisdictions

Built to withstand the thermal stress of furnace cabinets

Dual-Stage Modulation: Enhances comfort and efficiency by switching between high and low fire based on thermostat demand

allowing for seamless integration into existing belly band or stud mount configurations

Lochinvar & A.O. Smith 100277756 LWCO Probe 328140-751 Designed for high compatibility withThe Lochinvar & A. O. Smith 100277756 LWCO Probe is a critical safety component designed for low water cut off protection in high efficiency commercial boilers and water heaters. Engineered as a short length conductance type probe, this genuine OEM part (often referenced as WTR20011K) ensures the burner circuit is interrupted if water levels drop below the safe operating threshold, preventing catastrophic dry fire conditions. It is specifically