Zurn Z100-4NH-89 15" Cast Iron Roof Drain with Low Silhouette Poly Dome, External Water Dam, and 4" No-Hub Outlet

Prevent mold and damage from excess weight on your roof with this Zurn Z100-4NH-89 15" cast iron roof drain! This drain comes equipped with a 15" round low silhouette poly dome that gives rain and melted snow or ice room to flow freely into your drainage system while keeping out leaves and other debris. An external water dam is included so that the drain acts as an overflow device, giving water a place to go if the primary drainage system is backed up. Whether you need a way to remove water from the roof of your restaurant, retirement community, or warehouse, this roof drain is an excellent ch