The Vertical Firestop is a crucial venting accessory designed to preserve the fire-resistance rating of ceilings and floors where vent pipes pass through. Crafted from Category III stainless steel, it supports high-temperature exhaust applications and ensures safe, code-compliant installations for Noritz tankless water heaters and boilers. As part of the N-Vent system, this firestop integrates seamlessly with other components using a quick-snap connection, eliminating the need for tools or sealants.