Rated for a maximum working pressure of 125 PSI

The 137000 includes a quick-change replaceable cartridge valve and strainer

reducing the need for additional step-down transformers in specific burner configurations

the valve maintains a maximum working pressure of 500 psig and a Maximum Operating Pressure Differential (MOPD) of 300 psig

preventing nuisance trips often associated with inferior aftermarket alternatives

Williams 9940 Converter 321702-401 Rated for a maximum workingThe Williams 9940 Hard Wire Converter is a critical component for integrating modern electronic thermostats with older 24V furnace systems that lack a dedicated C wire. This HVAC power interface converts 115V line voltage into the 24V supply necessary to power digital controls, ensuring stable operation without battery drain. Designed specifically for compatibility with Williams furnace models and wall heaters, this 10VA rated converter facilitates a