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The Goodman B9102097 Liquid Line Cap with O-Ring is a genuine OEM service-port cap for CPC180XXX3BXXXAA condensing units and compatible Goodman/Amana systems. It seals the liquid line service valve stem, providing a secondary leak-tight barrier that keeps R-410A refrigerant contained and protects the Schrader core and valve stem from dirt and moisture between service visits.
The genuine OEM Goodman cap arrives with a correctly sized, refrigerant-rated O-ring matched to the valve thread, ensuring a proper secondary seal. Generic caps may ship without an O-ring or with a non-rated seal that hardens and leaks. For a small part that protects against refrigerant loss, OEM is the safe choice.
Easy. No system access required — simply hand-thread the cap onto the service valve and snug it to the manufacturer's spec (typically hand-tight plus a slight wrench turn). A 2-minute job. Confirm the O-ring is seated before tightening.