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The Goodman A3468601 is genuine OEM 3/16" ID pressure switch tubing for GDS81155CNA gas furnaces. This small hose connects the pressure switch to the inducer or vent port, transmitting the negative-pressure signal that proves proper draft before ignition. Cracked, hardened, or blocked tubing is a leading cause of pressure-switch lockouts and no-heat faults — a cheap part that solves an expensive-looking problem.
The genuine Goodman OEM tubing is cut to the correct ID and rated for the furnace's operating temperatures. Bulk generic hose may have the wrong wall thickness or degrade quickly near hot vent components, leading to nuisance faults. At this price, OEM is a no-brainer.
Very Easy (1 of 5). Slip the old tube off both ports and press the new one on. No tools required — verify a snug, leak-free fit on each nipple.