the EK-165S features 5/8" sweat (ODF) solid copper connections

Replacing the spider before total failure prevents metal-to-metal contact between the jaw hubs

When performing a teardown or boiler maintenance

95" WC Calibration: Fixed setpoint prevents ignition failure caused by inaccurate draft readings in condensing units

Verify your original part number or specific furnace model compatibility with a technician before installation

Williams P043800 Pilot Generator 320734-701 the EK-165S features 5/8" sweatThe Williams P043800 Pilot Generator is an essential OEM thermoelectric component specifically engineered for the Williams Monterey Top Vent Furnace 250 and 350 series. As a critical part of the furnace control assembly, this high grade thermocouple replacement converts thermal energy from the pilot flame into the millivoltage required to operate the gas valve without an external power source. This millivolt generator features heavy duty construction