Zurn Z101 - 20" Diameter Main Roof Drain Low Silhouette Dome mainline-siltfence The material’s thickness adds to

The material’s thickness adds to its durability

The perforated core allows water collection from both sides and provides a continuous flow path to designated drainage exits

a membrane clamp with weepholes for perimeter drainage

paved zones

Zurn Z101 - 20" Diameter Main Roof Drain Low Silhouette Dome mainline-siltfence The material’s thickness adds toThe Zurn Z101 is a 20 inch high capacity roof drain built to manage heavy stormwater loads on large commercial, industrial, and institutional buildings. Engineered for both performance and durability, it combines a rugged cast iron body with a low profile dome that keeps the roofline clean while ensuring reliable flow. Ideal for flat or low slope roofs, the Z101 helps prevent ponding, protects roof assemblies, and supports long service life in