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The Bard 5651-080BX is an OEM natural gas valve with 1/2 in. x 1/2 in. connections used in Bard gas heat sections to regulate and safely shut off natural gas flow to the burners during a call for heat. If your unit is experiencing no-heat conditions, inconsistent ignition, or suspected valve sticking or leakage, replacing with the correct Bard factory part helps restore proper gas control and reliable heater operation. Verify the part number and connection size against your Bard model and the unit’s wiring/controls before ordering to ensure correct fit and safe installation by a qualified technician.
Bard uses suffixes like "BX" to manage parts internally. These do not change the physical form or function of the part.
A part number ending in "BX" simply means it is packaged in a box for shipping, rather than for internal assembly use.
Example: 8406-142BX is physically identical to 8406-142.