Nibco B032650 Cast Copper Adapter 2-1/2 in C X M

Product Description

The NIBCO B032650 is a cast copper pipe adapter designed to transition between a copper sweat connection and a male threaded connection in pressure piping systems. The fitting uses a C x M end configuration, meaning one end accepts a copper tube via sweat soldering and the other end terminates in a male NPT thread. Sized at 2-1/2 inches, it is suited for larger-diameter domestic water, hydronic, and commercial plumbing lines where a secure, pressure-rated connection between copper tube and threaded pipe is required. Licensed plumbers and pipefitters are the primary installers of this component.

This adapter is used in residential and commercial plumbing installations where copper distribution lines meet threaded iron or brass fittings, valves, or equipment connections. It is appropriate for pressure applications including potable water supply, heating loops, and general fluid service lines. The 2-1/2 inch size is common in main distribution runs, mechanical room piping, and larger commercial systems. It meets ASTM B584 and ISO standards, confirming suitability for regulated pressure service work.

Key Features

• Cast copper construction provides durability and corrosion resistance in wet pressure service environments
• C x M end connection allows sweat-soldered copper tube on one end and a male NPT threaded connection on the other
• 2-1/2 inch fitting size suits main distribution and larger commercial piping runs
• Compliant with ASTM B584 and ISO standards for pressure fitting applications
• Pressure fitting style rated for use in pressurized water and fluid systems

Compatibility

Designed as an OEM-style pressure fitting for use with 2-1/2 inch copper tube systems requiring a sweat-to-male NPT threaded transition in residential and commercial plumbing applications.

Installation Notes

Installation is performed by a licensed plumber following applicable IPC and local plumbing codes. Shut off and depressurize the system and drain standing water before cutting into existing lines. The sweat end requires proper flux application, clean tubing, and a torch with appropriate solder per code before assembly. The male NPT thread end should be wrapped with thread sealant tape or pipe compound before engaging the mating fitting to ensure a leak-free joint.