CVP-16ADJ Noritz Concentric 16" Adjustable Vent Pipe The CVP-16ADJ is a finely finished durable stainless steel adjustable vent line for those though to be exactly certain measurement situations. This adjustable line has a simple push on connection, anti-corrosive and heat resistant connections, and is compatible with all heaters from the DVC series. As part of the N-Vent series, this product is UL approved category III venting, and is an integral part of the quick-snap connection system, known for easy installation and forming tight seals. Adjustable: No need to cut this vent line, as its length is adjustable in length from 11"-16.7". The versatility of its length is paired with single-wall penetration construction and ease of install design making it the perfect fit in almost any circumstance. In addition, the kit is part of the N-Vent series so it's approved for tankless and boiler stainless steel exhaust installations, enabling you to know you've made the right choice in both form and function.Adjustable length 11"-16.7".