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The Goodman B9102097 Liquid Line Cap with O-Ring is a genuine OEM sealing fitting engineered for WPH4436AHAB packaged heat pump units. It caps the liquid line service or charging port and, together with its factory O-ring, maintains a leak-tight refrigerant seal that protects system charge and efficiency.
The genuine Goodman cap ships with a correctly sized, refrigerant-rated O-ring that matches the port thread and seat exactly. Generic caps often use mismatched O-rings that harden or extrude under pressure, leading to slow refrigerant leaks and repeat service calls. For a critical sealing point like the liquid line, OEM is the reliable choice.
Easy (1/5). Recover or isolate refrigerant per EPA guidelines, thread the cap onto the port with the O-ring seated, and snug to spec. A refrigeration certification is required to open a sealed system. Typical install time is under 10 minutes for a qualified technician.
Restore the sealed performance of your WPH4436AHAB with a genuine Goodman replacement rather than a shortcut fitting.