CVK-V-1 Nortiz Concentric Vertical Vent Kit The CVK-V-1 vertical termination kit is the best choice for flat roof cold weather applications. The kit includes the rain cap, air intake pipe with snap connection, storm collar, and the angled roof flashing that is suitable for slopes between 0-15 degrees, and the drain tee. These components are specifically assembled to help ensure your installation is quick and complete. 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.Stainless Steel For all Noritz DVC heater seriesFor all weather locationsFor flat roof applications : 0-15 degreesPush-on connectionSingle-wall penetration