While it fits the physical T-4000 Series frame

carbon buildup

This aluminum pitot tube features a straight 4" insertion length

only the Williams P151800 OEM gasket should be used to provide the necessary thermal resistance and thickness

Honeywell 396221 Conversion Kit While it fits the physicalThe Honeywell 396221 Conversion Kit is a critical field component for technicians needing to transition single stage gas valves from natural gas to LP (liquid propane). Engineered for a precise 8" to 12" adjustment range, this kit is specifically compatible with the Honeywell VR8200, VR8300, SV9500, and SV9600 families, including popular series like the VR8205S and VR8215T. This assembly, often labeled as 396221 U, ensures the manifold pressure is