7"-9.4" Adjustable vent pipe The VP5-9.4ADJUST is a clean and durable stainless steel single wall venting pipe. This 5 in. diameter adjustable component is part of the N-Vent system, meaning its components form a perfect seal without the need to tighten. A quick-snap feature allows for easy connections making installation of a professional grade system easier than you would think. N-Vent: Not only is the Noritz N-Vent easy to install and known for its tight seals, but it is approved for tankless and boiler stainless steel exhaust installations, enabling you to know you've made the right choice in both form and function. Features: High temperature rated stainless steel Easy to install Quick-snap connection Unique gasket enables tight seal Superior design enables professional installation Introducing the latest advancements in tankless water heater technology for your home, Noritz tankless hot water heaters are both eco-friendly and energy efficient, providing savings up to 40% in utility costs. Their gas water heaters warm water on demand, which means you'll always have hot water and it will never run out.