K4115-3 - Lincoln Electric Hose Adapter 1 Inch to 1.75 Inch K4115-3

Optimize Your Fume Extraction System

Breathing clean air is non-negotiable in a professional welding shop, and your fume extraction system is the first line of defense. The Lincoln Electric K4115-3 Hose-To-Hose Connector is a vital component for welders who need to customize or repair their extraction setups. Designed to connect a 1-inch (25mm) hose to a 1-3/4 inch (45mm) hose, this adapter allows you to hook up different extraction nozzles, guns, or extension hoses to your main unit. Whether you are running a Lincoln Miniflex, Statiflex, or a custom shop vacuum system, having the right adapter means you can maintain maximum suction where it matters most—at the arc.

In a busy welding environment, hoses get dragged, stepped on, and reconfigured constantly. You need an adapter that can take a beating. The K4115-3 is constructed from durable materials capable of surviving the heat, grit, and physical impact typical of a welding floor. It ensures a smooth transition between hose sizes, which is critical for maintaining airflow velocity. A poor connection or a sudden, jagged reduction in hose size can cause turbulence and reduce the CFM (cubic feet per minute) of your extractor, leaving you exposed to more smoke. This Lincoln connector is engineered to minimize airflow restriction, keeping your capture zone effective and your lungs protected.

This adapter is incredibly useful for welders working in tight spaces, such as inside ship hulls or automotive chassis, where a smaller 1-inch hose might be necessary for maneuverability, but the main extraction unit uses a larger 1-3/4 inch line. It gives you the freedom to step down your hose size for better ergonomics without losing the connection to your powerful filtration unit. It is also a lifesaver for repair welding and maintenance crews who travel with portable gear and need to adapt to whatever equipment is available on-site.

Don't let mismatched hoses slow down your production or compromise your safety. The Lincoln K4115-3 is a simple, effective solution that belongs in every welder's toolbox. By ensuring a tight, leak-free connection between your hoses, you maximize the efficiency of your fume extractor and keep your workspace compliant and comfortable. Invest in genuine Lincoln Electric accessories from Welders Supply to guarantee the best fit and performance for your welding safety equipment.