Prevent odors and gasses from invading your RV living space with the Lippert 360 Siphon Roof Vent Generation 2. The updated design improves holding-tank ventilation and is easier to install. This refined model helps you avoid as much roof sealant work as possible for smooth, easy installation. Also speeds up waste breakdown, eliminating the need for harmful chemicals. Built-in bug screen. Built of strong polycarbonate. Universal fit. Prevents odor and gas from invading your RV Improves holding-tank ventilation Installs easier than previous models Speeds up waste breakdown Built-in bug screen