Nibco B029800 Cast Copper Drop Adapter 5-3/4 in C X F

Product Description

The NIBCO B029800 is a cast copper drop adapter designed for pressure piping systems in residential and commercial plumbing applications. This fitting measures 5-3/4 inches and uses a C x F end connection, meaning one end accepts a sweat (copper) connection and the other end features female NPT threads. Cast from copper alloy per ASTM B584, the B029800 provides reliable performance in pressure service. It is installed by licensed plumbers and pipefitters working on copper water distribution systems where a transition from soldered copper to threaded pipe or a fixture connection is required.

This drop adapter is suited for installations where a copper supply line must connect to a female-threaded fitting, valve, or fixture. The sweat-by-FNPT configuration is common in residential water supply rough-in work, commercial restroom fixture connections, and light commercial plumbing where copper pressure piping meets threaded components. The 5-3/4 inch fitting size accommodates larger-diameter pipe runs requiring a robust, code-compliant transition fitting.

Key Features

• Cast copper construction per ASTM B584 for pressure service durability
• C x F end connection: sweat inlet with female NPT threaded outlet
• 5-3/4 inch fitting size for larger-diameter copper pipe systems
• Pressure fitting style rated for water distribution service
• Meets ASTM B584 and ISO standards

Compatibility

Designed as an OEM-style pressure fitting replacement for copper pipe systems using C x F (sweat by female NPT) connections in residential and commercial plumbing applications.

Installation Notes

Installation is performed by a licensed plumber. Shut off the water supply and depressurize the line before soldering or making any threaded connections. The sweat end requires proper flux application, reaming, and a clean, dry pipe surface before soldering per accepted copper joining practices. Apply thread sealant or PTFE tape to the FNPT threads before assembling to the mating component. Work should comply with the International Plumbing Code and applicable local codes.