What are the symptoms of a failing 55/7

This OEM Reznor replacement part features durable brass construction

Its snap-fit design

Machined from solid round brass

Reznor 11831 Orifice What are the symptoms ofThe Reznor 11831 Orifice is a critical OEM replacement part designed for precision fuel regulation in gas fired heating systems. This brass gas orifice plug is specifically sized as a #35 natural gas orifice, ensuring the exact manifold pressure and BTU input required for optimal burner performance. In the field, installing the correct unit heater orifice is the difference between a clean, efficient burn and dangerous overfiring or soot accumulation.