High Output Performance: Provides a steady 750 millivolt signal to effectively power independent gas control circuits without external electricity

technicians should inspect the mating surfaces for pitting or warping before installation

02" fixed orifice to maintain the correct gas-to-air ratio for a stable pilot flame

allowing for clean

Industrial-Grade Thermal Performance: Built to withstand the high ambient temperatures of a boiler cabinet while maintaining efficient power transfer

Weil McLain 633-900-130 Residential Thermostat Refrigerant High Output Performance: Provides aWhen you're servicing or installing Weil McLain Plus or Gold Plus series indirect fired water heaters, maintaining thermal accuracy is non negotiable for system longevity and prevents short cycling. The Weil McLain 633 900 130 Residential Thermostat kit is an essential OEM replacement part designed for a precise operating range of 90F to 160F. This aquastat control integrates directly with factory configured drywells, ensuring the sensor bulb makes