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The Goodman B9102097 is a genuine OEM liquid line service cap, supplied with its sealing O-ring, for the Goodman WGHP4460AAF heat pump air conditioner. This cap seals the liquid line service port and provides a secondary leak barrier over the Schrader valve. A missing, cross-threaded, or O-ring-less cap is a frequent source of slow refrigerant leaks that drain charge over a season.
The OEM Goodman cap matches the exact thread size and pitch of the WGHP4460AAF service port, and the included O-ring is rated for refrigerant service. Generic caps may thread on but seat poorly or use an incompatible O-ring, allowing weep leaks. At this price, OEM is the obvious choice for a leak-tight seal.
Easy — under 5 minutes. Ensure the O-ring is seated, thread the cap on by hand, and snug it firmly (typically a quarter turn past finger-tight). No tools or refrigerant handling required for the cap itself.