the Williams P147200 is built to withstand the rigorous cycling and thermal expansion typical of the 1403

Common Questions When should I replace the collector box gasket

Durable Brass Construction: Resists corrosion and thermal expansion during high-cycle furnace operation

OEM Durability: Constructed to York technical specifications for better resistance to thermal fatigue compared to generic after-market switches

Why is Manning Glass fiberglass used for this gasket

Resideo 396021 Conversion Kit the Williams P147200 is builtThe Resideo 396021 Conversion Kit is a field proven solution designed to convert two stage gas valves from natural gas to liquid propane (LP). Specifically engineered for compatibility with VR820xQ, VR830xQ, VR820xN, and VR830xN series gas controls, this kit enables precise pressure regulation within an 8" to 11" WC adjustment range. As a direct replacement for part number 90 396021, it ensures seamless integration during system retrofits or fuel