Trane ORF0501 Standard Fire Orifice #44

The Trane ORF0501 is a Standard Fire Brass Orifice which is safety component in Trane HVAC systems. Constructed from brass, it is 5.7 inches in length and has a 44 connection size for use with particular Trane gas lines. In layman’s terms, this small hole is a safety mechanism in case of a fire. It regulates the gas flow to the burner to optimize your Trane furnace’s performance as required by the law. In the case of a fire, the orifice is extremely important. Its specific size and design reduces the capacity of the pipe line to convey gas and reducing any explosion and other dangers associated with it.