Nibco B258850 Cast Copper Union 1 Inch C X F

Product Description

The NIBCO B258850 is a cast copper pipe union sized at 1 inch with a C x F (sweat by female) end connection, designed for use in pressure piping systems. This fitting creates a separable joint in a copper water or hydronic line, allowing a section of pipe or equipment to be disconnected and reconnected without cutting. It is manufactured from cast copper and conforms to ASME B16.18 and ASTM B584 standards. Plumbers and pipefitters install this union in both new construction and retrofit applications where serviceability is required at a fixed point in the system.

This union is suited for residential and light commercial plumbing and hydronic heating systems. The sweat by female end configuration allows one side to be soldered directly to copper tube while the opposite end accepts a female-threaded connection, making it useful in mixed-connection installations where copper transitions to a threaded component. It is appropriate for pressure service in potable water supply, heating, and cooling distribution piping.

Key Features

• Cast copper construction meets ASTM B584 material requirements
• Conforms to ASME B16.18 dimensional and pressure standards for cast copper fittings
• 1 inch fitting size for standard copper tube systems
• C x F end connection supports sweat-to-threaded transitions
• Union design allows future disconnection and reconnection without pipe cutting

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1 inch copper pressure piping systems where a sweat by female union connection is required.

Installation Notes

Installation is performed by licensed plumbers or pipefitters. Shut off the water supply and depressurize and drain the affected line before cutting into the system. The sweat end requires proper flux application and soldering per applicable plumbing code; the threaded end should be made up with an approved thread sealant. Follow all local plumbing codes and ASME B16.18 guidelines for pressure piping.