Nibco B063750 Cast Copper 90 Elbow 3/8x1/2 Cxf

Product Description

The NIBCO B063750 is a cast copper 90-degree elbow fitting designed for copper piping systems in residential and light commercial plumbing and HVAC applications. It connects 3/8-inch copper tube (sweat end) to a 1/2-inch female threaded port, making it a practical transition fitting where a directional change and a threaded connection are needed at the same point. Manufactured from cast copper and tested to ASTM B584 standards, this pressure fitting is built to handle the mechanical and thermal demands of potable water, hydronic, and refrigeration piping systems. Licensed plumbers and HVAC technicians are the primary installers.

This fitting is suited for sweat-to-female-thread transitions in tight-space installations such as fixture supply lines, equipment connections, and branch takeoffs. The C x F end configuration accepts a standard 3/8-inch copper tube for soldering on one end while threading onto a 1/2-inch male-threaded component on the other. It is commonly used in residential plumbing rough-in, boiler piping, and hydronic distribution systems where a 90-degree directional change is required at a threaded connection point.

Key Features

• 90-degree turn with a sweat-to-female-thread configuration eliminates the need for a separate adapter fitting
• Cast copper construction meets ASTM B584 and ISO standards for pressure fittings
• 3/8-inch C (sweat) inlet x 1/2-inch F (female thread) outlet for mixed-connection piping runs
• Pressure fitting rating suitable for potable water, hydronic, and HVAC piping systems
• Compact, single-piece casting with no moving parts or seals to fail

Compatibility

Designed as an OEM-style pressure fitting for copper piping systems requiring a 3/8-inch sweat connection transitioning to a 1/2-inch female threaded port in standard plumbing and HVAC installations.

Installation Notes

Installation is performed by a licensed plumber or HVAC technician. Shut off the water supply and relieve system pressure before soldering. Clean and flux both the copper tube end and the fitting socket per standard practice before applying heat. Ensure the threaded female end is properly sealed with thread tape or pipe compound when connecting to a male-threaded fitting, and follow applicable IPC and local plumbing code requirements.