Parker FB4UC4-HBLK Push-to-connect Union 1/4 in Od

Product Description

The PARKER FB4UC4-HBLK is a push-to-connect union tube fitting designed for quick, tool-free connections in fluid and pneumatic line assemblies. Constructed from Kynar (PVDF), this union fitting handles up to 250 psi working pressure and carries a vacuum rating of 28 inches Hg, making it suitable for both pressure and vacuum service. The black color and FKM o-ring material indicate compatibility with a range of aggressive media where standard acetal fittings would be inappropriate. Licensed plumbers, HVAC technicians, and industrial pipe fitters install this fitting where a secure inline union connection is required without solvent cementing or threading.

This fitting is suited for 1/4 inch OD tubing runs in residential, commercial, and light industrial applications. Common install scenarios include chemical feed lines, condensate drain systems, instrument tubing, and process fluid lines where Kynar chemical resistance is specified. The push-to-connect design allows fast inline coupling and decoupling during system servicing. It is appropriate for use with compatible rigid or semi-rigid tubing meeting the 1/4 inch OD specification.

Key Features

• Kynar (PVDF) body construction for broad chemical resistance
• FKM o-ring provides a secure, leak-resistant seal
• 250 psi maximum working pressure
• 28 inches Hg vacuum rating for vacuum service applications
• Tool-free push-to-connect operation for fast installation and removal
• Black color coding for quick visual identification in multi-line systems

Compatibility

Designed as an OEM-style push-to-connect union fitting for 1/4 inch OD rigid or semi-rigid tubing in pressure and vacuum service lines.

Installation Notes

Installation requires no tools for the push-to-connect engagement, but ensure tubing ends are cut cleanly and squarely with a tube cutter before insertion. Depressurize and de-energize the system fully before replacing or installing this fitting. Verify tubing OD tolerance and material compatibility with Kynar and FKM before use in chemical service. Follow applicable plumbing or mechanical codes for the installation jurisdiction.