Our Products Details

Specification
21500 Series coated cast iron Roof Drain, large polypropylene locking dome, WEJLOC non-puncturing clamp ring with integral gravel stop, large sump with wide roof flange and bottom outlet.

Application
Used on roofs of any size and any type of construction. Large slotted dome provides maximum free area for quick drainage of rainwater and protects the sump and connected pipe from debris. WEJLOC compression flashing clamp holds the membrane or flashing securely to the drain body. Include -16 internal water guard option for overflow drain applications.

Roof drains are an essential component of a building’s drainage system, as they serve to safely and efficiently carry rainwater and melted snow from the roof to the ground level. The large sump, clamp ring, and poly dome are key features of a roof drain that ensure its optimal performance. The large sump provides a generous space for water to collect and flow into the drain, preventing ponding on the roof and potential damage to the building structure. The clamp ring secures the roof drain in place, creating a watertight seal and preventing leaks. The poly dome serves as a protective cover for the drain, preventing debris and other foreign objects from clogging the system and ensuring smooth water flow.

The design and materials used in the construction of roof drains with a large sump, clamp ring, and poly dome are carefully selected to withstand harsh weather conditions and prolong the lifespan of the drainage system. The large sump allows for greater water storage capacity, reducing the risk of overflow during heavy rainfall events. The clamp ring is made of durable materials that provide a secure attachment to the roof, preventing water leakage and structural damage. The poly dome is UV-resistant and resistant to corrosion, ensuring its longevity and effectiveness in protecting the roof drain system. Overall, roof drains equipped with a large sump, clamp ring, and poly dome offer a reliable and efficient solution for managing rainwater runoff and preserving the integrity of a building’s structure.