CVP-90ADJELB Noritz Concentric 90 Degree Adjustable Elbow  The CVP-90ADJELB 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 12.6"-15.8". 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.90 Degree Adjustable ElbowStainless Steel