Lennox 74W71 Manifold 319825-402 The 13-511-B15 is rated for

The 13-511-B15 is rated for saturated steam service up to 250°F (121°C)

Common Questions Is the Teflon seal included with this valve kit

ensure the mating surfaces are clear of old sealant to maintain the pressure differential required by the draft inducer motor

The 5/8" x 1 7/8" keyed shaft and reversible rotation capability provide the field flexibility needed for various airflow configurations

this furnace ignitor is critical for maintaining the sequence of operation in Carrier

Lennox 74W71 Manifold 319825-402 The 13-511-B15 is rated forThe Lennox 74W71 Gas Manifold (OEM part 103087 02) is a precision engineered component designed for high efficiency fuel distribution in Lennox gas furnaces and select commercial rooftop units. As a direct fit HVAC replacement part, it ensures balanced gas flow to the burner assembly, mitigating pressure fluctuations that cause combustion instability and resonance noise. Constructed from aluminized steel, this manifold resists the high heat corrosion