The Zurn® Z100 15 in Dia roof drain has a Dura-Coated cast iron body with combination membrane flashing clamp/gravel guard and low silhouette Poly-Dome.
Zurn® Main Roof Drain, Series: Z100, 6 in Outlet, Inside Caulk, Cast Iron Drain, 12-1/2 in Dia x 4-11/16 in H Grid, Polypropylene Grid, Dura Coated, Blue, Deck, 15 in Dia x 9-15/16 in H