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The Goodman B9102097 Liquid Line Cap with O-Ring is the genuine OEM service-port cap that seals the liquid line connection on Goodman WPC4442AHAB air conditioning systems. Supplied with its matched O-ring, this cap provides a secondary leak-tight barrier over the service valve, protecting the refrigerant charge from slow leaks and keeping moisture and contaminants out of the sealed system. A missing or dry-rotted cap is one of the most overlooked causes of gradual refrigerant loss.
The genuine Goodman cap ships with the correctly sized O-ring and thread pitch for a guaranteed seal. Generic caps frequently come without an O-ring or with a mismatched durometer that hardens and leaks. The OEM kit gives you a complete, ready-to-torque seal.
Very Easy (1/5). Seat the O-ring, hand-thread the cap onto the service port, and snug with a wrench. No refrigerant recovery or special tools needed — under 5 minutes.