Nibco B145550 Cast Copper Tee 3/8in C X C X F

Product Description

The NIBCO B145550 is a cast copper pressure tee fitting designed for joining copper tubing in plumbing, HVAC hydronic, and refrigeration piping systems. It features a C x C x F end connection pattern, meaning two sweat (solder) cup ends and one female threaded end, giving the installer the flexibility to branch a threaded component off a soldered copper run. At 3/8 inches, this fitting is sized for small-diameter copper tube work. Cast copper construction delivers the pressure integrity and corrosion resistance expected in potable water and mechanical system applications. Installation is performed by a licensed plumber or HVAC pipefitter.

This fitting is suited for residential and light commercial plumbing and hydronic piping applications where a branch connection is needed on a 3/8-inch copper line. The female threaded outlet allows a threaded valve, gauge, or instrument to be integrated directly into a solder-joint copper circuit without an additional adapter. Typical use cases include domestic water distribution branches, radiant heating circuits, and refrigeration piping where a threaded port is required at a tee location.

Key Features

• Cast copper construction meets ASTM B584 for pressure and corrosion performance
• C x C x F end connection combines two sweat cup ends with one female threaded outlet
• 3/8 inches fitting size for small-diameter copper tube applications
• Pressure fitting style rated for typical potable water and hydronic system pressures
• Compact, single-piece cast body — no crimping or mechanical assembly required

Compatibility

Designed as an OEM-style pressure fitting for 3/8-inch copper tube systems installed to standard plumbing and mechanical codes. Meets ASTM B584 and ISO standards for copper alloy castings used in pressure service.

Installation Notes

Installation should be performed by a licensed plumber or qualified pipefitter in accordance with applicable IPC or local plumbing code requirements. Shut off and depressurize the water or fluid system and allow all lines to drain fully before cutting into an existing copper circuit. Sweat cup ends require proper flux application, a torch, and lead-free solder compliant with current potable water codes. The female threaded outlet should be joined with an appropriate thread sealant rated for the service fluid.