The BLUCHER Concentric Increaser is a stainless steel pipe fitting that increases pipe size from 3 inches to 4 inches. It has a concentric reducer design that evenly transitions between the two pipe sizes over a short distance. The fitting is made from 304 stainless steel for corrosion resistance. It has a pressure rating of 10 bar at 70°F and is designed for use in industrial piping applications with water, air, gas, steam, oil and more. The ends are beveled for ease of welding. It meets dimensional standards such as DIN and ANSI. The fitting provides a smooth transition to prevent turbulence and pressure drops.