it eliminates the sizing and alignment issues common with universal aftermarket alternatives

remove the fast-fill lever cap and loosen the lock nut

The Maxitrol M511B-3/4 is an industrial-grade modulating gas valve specifically engineered for direct-fired burners operating under negative pressure

While dimensions may appear similar to other brands

Rugged Construction: Features a forged brass housing and nickel-plated stem for superior corrosion resistance and longevity

Lochinvar & A.O. Smith 100110717 Transformer 321042-401 it eliminates the sizing andThe Lochinvar & A. O. Smith 100110717 Transformer is a critical low voltage power solution engineered for commercial water heaters and high efficiency boiler control circuits. This 120V to 24V step down transformer provides a steady 40 VA output, ensuring consistent performance for ignition modules, gas valves, and electronic controllers. Designed as a direct OEM replacement (also referenced as 9005901205), it features a primary voltage tap of 120V