York S1 023 16881 000 Fitting L99H008 and fasteners necessary to maintain and fasteners necessary to maintain the structural integrity of the draft inducer housing and vent system The York S1 028 15540 000 Condensate Hose is a critical OEM HVAC replacement part engineered specifically for high efficiency condensing units and residential furnaces The York S1 023 16881 000 Fitting is a mission critical 5 16 hex air pressure tap fitting designed for high accuracy pneumatic sensing in residential and light commercial HVAC cabinets Technicians usually replace these when the internal port becomes obstructed by debris or when the hex head is rounded off due to corrosion or over torquing during maintenance