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Bard part number 9043-422 is an OEM inlet gas connector used on Bard HVAC equipment with gas heat to couple the incoming gas supply connection into the unit gas train, helping maintain a secure, leak-resistant path for proper burner operation. This connector is typically replaced when threads are damaged, fittings are distorted, or a gas leak is suspected at the unit inlet. Using the correct Bard replacement helps ensure proper fit to the factory piping layout and supports safe, reliable ignition and heating performance. Always confirm compatibility by matching the part number to your Bard model and service literature, and have gas line work performed and leak-checked by a qualified technician.