Each brass component is precision-machined for high-heat durability and consistent gas velocity

the AL-190 features a durable plastic body construction and comes equipped with a dedicated mounting bracket and fittings compatible with 1/4" O

Always verify your system's parts manual before installation

essential for complex manifold configurations

It provides a linear 0-10Vdc output signal over a 0-50 PSID pressure range

Williams 7735 Limit Switch 320074-702 Each brass component is precision-machinedThe Williams 7735 Limit Switch is a critical OEM replacement part designed for high temperature safety regulation in Williams Forsaire Counterflow top vent furnaces. Engineered with a 330F fixed temperature setpoint and a 5 inch insertion depth, this high limit safety control ensures the combustion chamber does not exceed safe operating parameters. When air temperature reaches the 330F threshold, the switch opens the electrical circuit to the gas