Nibco B159950 Cast Copper Tee 3/4x1/2x3/4 C X F X C

Product Description

The NIBCO B159950 is a cast copper pressure tee fitting used in potable water, hydronic heating, and general plumbing distribution systems. It joins three lines in a tee configuration with a 3/4 inch run, a 3/4 inch outlet, and a reduced 1/2 inch branch. The end connections are configured C x F x C, meaning the two run ends are sweat (copper solder) connections and the branch end is a female threaded connection. This combination allows a transition from soldered copper lines to a threaded branch takeoff without an additional adapter. Plumbers and pipefitters install this fitting during new construction and retrofit work on residential and light commercial systems.

This fitting is suited for pressure applications in residential and light commercial plumbing. The C x F x C configuration is common in branch takeoff scenarios where a threaded valve, gauge, or fixture connection is required at the branch while maintaining soldered copper continuity on the main run. It is manufactured to ASTM B584 and ISO standards, confirming suitability for pressure service in typical plumbing systems. The 3/4 x 1/2 x 3/4 inch size makes it a standard choice for reducing branch lines off 3/4 inch copper mains.

Key Features

• Cast copper construction meets ASTM B584 and ISO standards for pressure fittings
• C x F x C end connections allow direct solder-to-threaded branch transition
• 3/4 x 1/2 x 3/4 inch configuration reduces branch to 1/2 inch while maintaining 3/4 inch run continuity
• Pressure fitting style rated for potable water and hydronic plumbing service
• Compact cast form at 0.26 pounds for easy in-wall and overhead installation

Compatibility

Designed as an OEM-style pressure fitting replacement or new-installation component for 3/4 inch copper main lines requiring a 1/2 inch female threaded branch takeoff in residential and light commercial plumbing systems.

Installation Notes

Installation is performed by a licensed plumber in accordance with the International Plumbing Code. Shut off the water supply and depressurize the line before cutting or soldering. The sweat ends require proper flux application, heating with a torch, and lead-free solder per applicable code. The female threaded branch connection should be made with appropriate thread sealant or PTFE tape and not overtightened to avoid cracking the female threads.