Robertshaw 710-203 1/2" Gas Valve RV Snap-Acting 36" Cap Non-Regulator is a mechanical gas control valve designed to regulate fuel flow in compatible gas-fired heating equipment. It works by responding to the connected control mechanism to quickly open or close the gas passage, providing dependable burner control during heating cycles. Designed for use with compatible furnaces, boiler... https://www.partshnc.com/710-203-robertshaw-12-rvsnapactgasvlv-36-non-reg