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The Goodman B9102097 Liquid Line Service Cap with O-Ring is a genuine OEM sealing cap for the liquid line service valve on the Goodman WGPH4524AMAB packaged air conditioning system. The cap forms the secondary, leak-tight seal over the service port after gauges are removed — the integrated O-ring is the critical element that prevents slow refrigerant loss. Missing caps or dried, cracked O-rings are a common and easily overlooked source of system leaks.
The OEM cap matches the exact thread pitch and O-ring durometer for a guaranteed seal. Generic caps may fit loosely or use incompatible O-rings that degrade and leak. OEM provides reliable, long-term refrigerant containment.
Easy — Hand-thread the cap onto the service port and snug to spec. No refrigerant recovery or special tools required.