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Bard part 9043-318 is an OEM pressure switch tubing used to carry the air pressure signal to the unit’s pressure switch so the control system can prove proper draft and safe operation before ignition and during a heat call. If the original tube is brittle, cracked, softened, or restricted by debris or moisture, the pressure switch may not close reliably and the unit can lock out or short cycle. Replacing the tubing with the correct Bard factory part helps restore a tight, leak free sensing path and proper switch response, and it is a smart fix anytime you are replacing the pressure switch or servicing the draft proving circuit on compatible Bard HVAC equipment.
* Orders less than $50 may incure a minimum order fee.