Gas vent pipes are suitable for releasing sewer gases from waste pipes to the outside of the house. These vertical pipes run through the roof of the facility and allow fresh air into the plumbing system for smooth water flow through the drain pipes. Raptor Supplies offers a wide range of these vent pipes from brands like and Ameri-Vent and Westaflex. Gas vent pipe kits include a cap, storm collar, draft hood connector, flashing and a 90-degree L-shaped connector for quick installation. We also offer Ameri-Vent EAL Series adjustable 90-degree elbows comprising four sections for smoother bends and minimal resistance. They can be used for clearing rafters / ceiling joists and are available in 3, 4, 5 and 6 inch diameter options.