Parker 639CA-4 Compression Tube Plug Brass

Product Description

The PARKER 639CA-4 is a brass compression tube plug designed to terminate or cap off a compression tube line in fluid and gas distribution systems. It uses a standard compression end connection to create a secure, leak-resistant seal without threading into a port. Rated for a maximum working pressure of 1400 psi and a temperature range of -65 to 250 degrees F, this plug handles the demands of industrial, HVAC, and instrumentation plumbing applications. It is sized for tube fitting installations and is typically installed by licensed plumbers, HVAC technicians, and pipefitters working on hydraulic, pneumatic, or refrigerant-adjacent tubing systems.

This compression tube plug is suited for use in residential and light commercial systems where a tube run must be capped, isolated, or terminated at a junction. Its all-brass construction resists corrosion and holds up in both wet and dry service environments. The wide operating temperature range makes it appropriate for both low-temperature refrigeration applications and moderate-heat fluid lines. It ships as a single unit and meets NPTF thread standard requirements where applicable.

Key Features

• Brass construction for corrosion resistance in fluid and gas service
• Maximum working pressure of 1400 psi for demanding applications
• Temperature range of -65 to 250 degrees F
• Compression tube end connection for tool-assisted, leak-resistant termination
• NPTF thread standard compliance
• Compact plug design for tube line capping and isolation

Compatibility

Designed as an OEM-style compression fitting plug for use in compression tube systems operating within the rated pressure and temperature limits of this fitting.

Installation Notes

Installation should be performed by a licensed plumber, pipefitter, or HVAC technician familiar with compression fitting assembly. Depressurize and isolate the line completely before removing any existing fittings or installing this plug. Use appropriate tube preparation tools to ensure a clean, square tube cut and proper ferrule seating. Do not overtighten the compression nut, as this can deform the ferrule and compromise the seal.