Nibco B515456 Cast Copper Threaded Companion Flange 4 in

Product Description

The NIBCO B515456 is a cast copper threaded companion pipe flange designed for use in plumbing and piping systems that require a secure, leak-resistant flanged connection. Built to a 150 psi pressure rating, this flange accommodates 4-inch pipe with a 9-inch outer diameter and features female threaded end connections for straightforward field installation. Bolt hole centers are spaced 7.5 inches across, conforming to standard flange bolt patterns. Licensed plumbers and pipefitters install this type of fitting in a wide range of commercial and industrial piping applications where copper material compatibility is required.

This flange is suited for commercial and industrial piping systems where threaded copper fittings are specified. The companion flange style allows it to be paired with a mating flange to form a bolted, gasketed joint — a common configuration in mechanical rooms, boiler rooms, and process piping installations. Its 150 psi pressure rating makes it appropriate for low-to-medium pressure liquid service applications. The threaded female connection end accommodates standard NPT-threaded pipe for assembly without welding or soldering.

Key Features

• Cast copper construction for corrosion resistance in plumbing and piping service
• 150 psi pressure rating for low-to-medium pressure liquid systems
• 4-inch pipe size with 9-inch outer diameter
• Female threaded (F) end connection for NPT pipe assembly
• 7.5-inch bolt hole circle spacing for standard flange bolt patterns
• Companion flange style designed to mate with a corresponding flange fitting

Compatibility

Designed as an OEM-style replacement or new-installation companion pipe flange for 4-inch threaded copper piping systems rated to 150 psi service.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable IPC and local plumbing code requirements. Shut off and depressurize the piping system completely before disassembling any flanged joint. Use an appropriate flange gasket and torque fasteners evenly in a cross pattern to ensure a uniform seal — consult applicable flange standards for fastener specifications. Do not exceed the 150 psi rated working pressure of this fitting.