Parker FB6UC4-HBLK Push-to-connect Union 3/8 Inch Od

Product Description

The PARKER FB6UC4-HBLK is a push-to-connect union tube fitting designed for quick, tool-free connections in fluid and pneumatic systems. Built from Kynar (PVDF), this fitting handles up to 250 psi and is rated for a vacuum of 28 inches Hg, making it suitable for both pressure and vacuum line work. The black color and FKM O-ring construction signal compatibility with a range of aggressive media where standard acetal fittings fall short. Plumbers, HVAC technicians, and industrial pipefitters install this type of fitting when a fast, reliable inline union connection is needed without threading or soldering.

This fitting is suited for residential and light commercial fluid handling, pneumatic control lines, and chemical distribution systems where Kynar's chemical resistance is a requirement. The 3/8 inch OD tube size is common in process tubing, HVAC refrigerant-adjacent control lines, and water treatment applications. Its compact footprint makes it practical in tight panel or equipment enclosures.

Key Features

• Kynar (PVDF) body construction for strong chemical and UV resistance
• Push-to-connect design allows tool-free tube insertion and secure locking
• FKM O-ring seals rated for compatibility with a broad range of fluids
• 250 psi pressure rating for reliable performance in pressurized systems
• 28 inches Hg vacuum rating supports vacuum line applications
• Black color finish for easy field identification

Compatibility

Designed as an OEM-style push-to-connect union replacement for systems using 3/8 inch OD tubing where Kynar body material and FKM O-ring seals are specified.

Installation Notes

Installation is performed by a licensed plumber, HVAC technician, or qualified pipefitter. Before servicing, isolate and depressurize the line and verify that the tubing OD is clean, burr-free, and cut square before insertion. Confirm that the tubing material and system media are compatible with Kynar and FKM before installing. Verify the completed connection holds pressure before returning the system to service.