Nibco, Inc. 6002 4x2 Straight Reducing Coupling Copper FTG 4 in FTG 2 in

4-inch by 2-inch copper reducing coupling

This straight reducing coupling joins a 4-inch copper fitting to a 2-inch copper tube using sweat connections. It is made from wrot copper and rated for air, gases and potable water systems. The fitting handles a maximum operating pressure of 293 psi at 100 degrees Fahrenheit and a maximum operating temperature of 400 degrees Fahrenheit. It suits residential and commercial plumbing installations that require a secure, permanent joint between different tube sizes.

Wrot copper construction with sweat ends

The coupling uses a fitting-to-cup design so the larger end slides over a 4-inch tube while the smaller end accepts a 2-inch tube for soldering. Wrot copper provides consistent wall thickness and corrosion resistance for long service life in water supply and gas lines. Sweat connections create leak-free joints when properly cleaned, fluxed and soldered, eliminating the need for threaded adapters or mechanical clamps. The straight profile keeps the flow path smooth and compact in tight runs.

Replaces threaded reducers or separate bushings

This single-piece coupling replaces assemblies that combine a reducer with a separate bushing or threaded adapter, reducing potential leak points and installation time. The jump is worth it when you need a direct, code-compliant transition between 4-inch and 2-inch copper without extra fittings. It is not for installers who need a press-connect, push-fit or flanged connection, or who are working with tube sizes outside the 4-inch and 2-inch copper range specified here.