This brass gas orifice features a standard #42 drill size

ODF (Over Desired Fitting) means the valve is designed to slide over a 1 3/8" copper line for a standard sweat/braze connection

Smith GPSH 40/50 Series 201 models

replacing a fast-open valve with a slow-open gas valve should only be done if specified by the manufacturer's cross-reference data to ensure ignition timing remains within safe parameters

Nordyne 921498 Control Board 322838-752 This brass gas orifice featuresThe Nordyne 921498 Control Board is a critical OEM replacement component engineered for high performance management of modulating furnace systems and packaged units. Specifically designed for the G7 series furnace, this integrated furnace control manages critical sequencing including induction, ignition timing, and blower motor speed regulation. It features a 24 VAC control circuit protected by an onboard 3A fuse to prevent damage from low voltage