replacing a fatigued flapper is essential to prevent internal leakage and maintain peak thermal efficiency

A difference exceeding 3°F typically indicates an internal bypass

What fuel type does this pilot assembly use

Will this work in both heating and cooling applications

Can this valve be used for both heating and cooling cycles

Nordyne 664304R Manifold Tube 318820-201 replacing a fatigued flapper isThe Nordyne 664304R Manifold Tube is a critical engineering component designed for high efficiency gas furnaces and HVAC systems. As a genuine OEM gas manifold, this 4 burner upflow manifold ensures precise fuel distribution to the burner assembly, maintaining the correct pressure balance required for clean combustion. This specific Nordyne replacement part is engineered for the G6 series, specifically the 90% AFUE upflow natural gas furnaces, and is