Product Details
The Josam 21504-Z is a large sump roof drain featuring a robust poly dome and a 4" no-hub outlet. This cast iron roof drain is equipped with a large polypropylene locking dome and a WEJLOC® non-puncturing clamp ring with an integral gravel stop, ensuring durability and effective drainage. The design includes a large sump with a wide roof flange and bottom outlet, making it suitable for roofs of any size and type of construction. The large slotted dome provides 124 square inches of free area for efficient drainage of rainwater while protecting the drain sump and connected piping from debris. The product adheres to relevant certifications and complies with industry standards, ensuring reliable performance.
