Product Overview
CONCENTRIC VENT KITS System 636 Concentric Vent Kits (CVK), are available in a variety of lengths and come in 2", 3" and 4" diameters. These pipe-in-pipe kits allow exhaust and intake pipes to penetrate the roof or side wall through only one hole. The concentric vent kits are now certified with mechanically fastened rain caps. When installed with the included stainless steel screw/nut, the rain cap can be easily removed for cleaning or maintenance. Vent screens and round face plates for side wall terminations are also available.