Parker 20-4 Barbed Tube Plug Brass 0.17 in Id

Product Description

The PARKER 20-4 is a brass barbed tube plug designed to seal the open end of flexible tubing in fluid handling and pneumatic systems. The multiple-barb design grips the inner wall of the tubing to create a secure, pull-resistant seal without the need for clamps or adhesives. With a tube inside diameter of 0.17 inches and a tube outside diameter of 0.25 inches, this plug is sized for small-bore tubing commonly found in HVAC, refrigeration, plumbing, and light industrial applications. Licensed tradespeople and technicians install these plugs when capping unused tubing ports or isolating a section of a fluid circuit during service.

This plug is suited for low-pressure fluid or air line applications where a compact, reusable end-seal is needed. It is commonly used in residential and light commercial HVAC equipment, condensate drain lines, and pneumatic control tubing. The brass construction makes it appropriate for applications where corrosion resistance and moderate pressure handling are required. Installers typically use this type of plug when decommissioning a branch line or capping a tubing run during system modifications or repairs.

Key Features

• Multiple-barb profile locks into tubing inner wall for a secure, clamp-free seal
• Brass construction provides corrosion resistance in fluid and air service
• Fits tubing with 0.17 inch inside diameter and 0.25 inch outside diameter
• Compact form factor suits tight spaces inside equipment cabinets and panels
• No tools required for installation into flexible tubing

Compatibility

Designed as an OEM-style replacement or service fitting for flexible tubing with a 0.17 inch inside diameter and 0.25 inch outside diameter in fluid handling or pneumatic systems.

Installation Notes

Installation is performed by plumbers, HVAC technicians, or pipefitters working on low-pressure tubing systems. Before installing, shut off fluid supply or depressurize the pneumatic circuit completely. Push the barbed plug firmly into the tubing end until the barbs seat fully against the inner wall. Verify the tubing is free of cuts or splits at the end before plugging, as damaged tubing will not hold the barb securely.