Nibco B072750 Cast Copper 90 Union Elbow 3/8 in C X M

Product Description

The NIBCO B072750 is a cast copper 90 degree union elbow designed for pressure piping applications in residential and light commercial plumbing and HVAC systems. This fitting connects copper tubing using a C x M (sweat by male) end connection, allowing it to transition between a soldered socket end and a male threaded end in a single fitting. At 3/8 inch fitting size, it is well suited for smaller-diameter copper runs where a right-angle directional change is required. Cast copper construction provides reliable pressure integrity and durability in both hot and cold water service lines.

This fitting is commonly installed in residential plumbing supply lines, hydronic heating branch lines, and HVAC refrigerant or condensate piping where a 90 degree turn and a male threaded outlet are needed in one compact component. Licensed plumbers and HVAC technicians install this type of fitting during new construction, system expansion, or repair work on 3/8 inch copper tubing runs. The C x M configuration is a standard approach when connecting to a threaded valve, fixture, or appliance fitting without the need for an additional adapter.

Key Features

• 90 degree union elbow geometry allows directional changes and union-style separation in confined spaces
• C x M end connection combines a sweat socket inlet with a male threaded outlet in one fitting
• Cast copper construction meets pressure fitting standards for plumbing and HVAC service
• 3/8 inch fitting size compatible with standard 3/8 inch copper tubing
• Compact, single-piece design reduces the need for additional adapters or couplings

Compatibility

Designed as an OEM-style pressure fitting replacement or new-installation component for 3/8 inch copper tubing systems using sweat and male threaded connections.

Installation Notes

Installation of copper sweat fittings should be performed by a licensed plumber or qualified HVAC technician in accordance with applicable IPC and local plumbing codes. Shut off and depressurize the water or fluid system and drain the line before cutting or sweating any fitting. Clean all mating surfaces and apply flux per standard soldering practice before applying heat. Do not overheat cast copper fittings, as excessive heat can damage the fitting integrity or cause flux to burn off before solder flows properly.