Unlike the standard 157S which resets automatically when the water level is restored

Utilizing genuine Weil-McLain parts like the 512-200-079 prevents the common harmonics and delayed ignition "bang" often associated with inferior universal alternatives

Compatibility: Engineered as a direct drop-in for Nordyne 626465

When installing gas furnace control parts

Lochinvar & A.O. Smith 100233496 Thermostat Well 318973-401 Unlike the standard 157S whichWhen you are dealing with a faulty temperature sensor or a leaking immersion point in a hydronic system, the Lochinvar & A. O. Smith 100233496 Thermostat Well is the OEM spec solution required for a professional grade repair. This bulb well features a 3 4 inch NPT threaded connection and a . 382 inch ID, designed to house the temperature sensing probe securely while preventing direct contact with the system fluid. Built for high durability performance