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The GOODMAN 86683 is a universal refrigerant locking pipe cap designed for use on 0.25 inch nominal FNPT fittings in refrigeration and air conditioning systems. Constructed from brass with a pink color designation, this cap threads onto female NPT ports to seal refrigerant lines and service ports against contamination, moisture, and unauthorized access. The locking design adds a layer of tamper resistance suited to systems containing R-410A refrigerant. HVAC technicians use this cap during service, storage, or when a line set is temporarily taken out of service. The 50-piece pack supports shop stock and fleet service trucks.
This cap is used in residential and light commercial HVAC applications wherever 0.25 inch FNPT refrigerant service ports require protection. Typical installations include split-system air conditioners, heat pumps, and refrigeration equipment using R-410A. The pink color coding helps technicians quickly identify the cap type on the job. The 50-piece pack format is practical for service companies stocking multiple units or replenishing field kits.
Designed as a universal replacement-style locking pipe cap for 0.25 inch nominal FNPT refrigerant service ports on residential and light commercial HVAC and refrigeration equipment.
Installation is typically performed by a licensed HVAC technician. Recover or isolate refrigerant pressure from the service port before removing any existing cap or fitting. Thread the cap onto the FNPT port by hand and snug with an appropriately sized wrench — do not overtighten brass fittings, as this can damage threads. Follow applicable EPA Section 608 refrigerant handling regulations during any service work on the system.
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