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The Goodman B9102097 Liquid Line Cap with O-Ring is a genuine OEM service fitting designed for the Goodman WGHP4436AAG packaged heat pump and compatible air conditioning equipment. This cap seals the liquid line service port to prevent refrigerant loss and keep moisture and contaminants out of the sealed system. The included O-ring ensures a reliable, leak-free seal that meets factory specification.
This is a genuine OEM Goodman part, machined to exact factory tolerances so the O-ring seats correctly and holds full system pressure. Generic aftermarket caps are lower cost but vary in thread pitch and O-ring quality, which can lead to slow refrigerant leaks. For a critical sealing component, the OEM part is the recommended choice.
Easy — Hand-tighten onto the service port and snug with a wrench. No special tools or refrigerant handling required for the cap itself. Always verify the O-ring is seated before tightening. EPA certification is required for any work that opens the sealed refrigerant system.