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Bard part number 106-138 is an OEM top-fill component used on select Bard wall-mount HVAC equipment to support proper water management during service, helping technicians add water quickly and reduce the chance of spills or air being introduced where it should not be. Replacing a worn, cracked, or missing top-fill piece helps maintain correct fill function and keeps your unit operating the way Bard intended. Because top-fill parts can vary by model and revision, match 106-138 to your unit model and serial number before ordering to ensure proper fit and sealing.