Nibco B057250 Cast Copper 90 Elbow 4x3 Cxc Pressure Fitting

Product Description

The NIBCO B057250 is a cast copper 90-degree close rough elbow designed for sweat-connect pressure piping systems. It features a 4-inch inlet and a 3-inch outlet with copper-to-copper (C x C) end connections, making it a reducing elbow for directional changes in pressurized water or hydronic lines. The close rough pattern provides a tight turn radius suited for installations with limited clearance. Licensed plumbers and mechanical contractors install this fitting in both new construction and retrofit applications where a 90-degree reduction is required in a copper pressure system.

This fitting is used in residential and commercial plumbing and hydronic heating systems where copper pressure piping is the specified material. It is appropriate for supply, return, and distribution lines requiring a 90-degree change in direction combined with a reduction from 4 inches to 3 inches. The C x C sweat end connections are compatible with standard copper tubing and are joined using lead-free solder per applicable plumbing codes.

Key Features

• Cast copper construction for durability in pressure piping applications
• 90-degree close rough elbow geometry with tight turn radius
• Reducing configuration: 4-inch inlet x 3-inch outlet
• C x C end connections for sweat-soldered installation
• Rated as a pressure fitting for use in pressurized plumbing and hydronic systems

Compatibility

Designed as an OEM-style pressure fitting compatible with standard copper tubing in 4-inch and 3-inch nominal sizes per ASTM and IPC requirements. No specific model compatibility data was provided in the product input.

Installation Notes

Installation should be performed by a licensed plumber in accordance with the International Plumbing Code (IPC) and applicable local codes. Shut off and depressurize the water or hydronic system before cutting or joining any pipe. Clean and flux all mating surfaces before soldering; use lead-free solder where required by code for potable water applications. Avoid applying excessive heat to the fitting body during soldering to prevent damage to the cast copper material.