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The Goodman B9102097 Liquid Line Cap with O-Ring is a genuine OEM sealing fitting engineered for the Goodman/Amana WPH4348AHBB packaged heat pump. It caps the liquid line service port and, combined with its factory-matched O-ring, maintains a leak-free seal on the sealed refrigerant system. Using the correct OEM cap protects your charge and prevents the slow refrigerant loss that leads to weak cooling and heating performance.
Generic caps often ship with the wrong O-ring durometer or thread pitch, which can weep refrigerant over time. This OEM part matches the factory thread and seal exactly, so you get a positive, service-rated seal on the first install.
Hand-tightening onto the service port takes only a few minutes. Note: any work that opens the sealed refrigerant system must be performed by an EPA 608–certified technician. Simply reseating a service cap is homeowner-friendly.