whereas the AGA22 yellow spring is the required upgrade for higher 6-48" W

Reliability: Direct factory match for CV6233187020

the Bard 8105-031BX is identical to the 8105-031

or failure of the fan to activate after the burners ignite

Resideo VR8305M3506 Valve 319852-301 whereas the AGA22 yellow springThe Resideo VR8305M3506 is a professional grade direct ignition dual automatic combination valve engineered for single stage gas fired appliances. Designed for compatibility with high performance direct spark ignition (DSI) and hot surface ignition systems, this 24Vac gas control valve features a straight through body pattern with a 1 2" NPT inlet and 3 4" NPT outlet. Field technicians and contractors rely on this combination gas control for its