3 in Overflow Roof Drain with Standpipe

SPECIAL ORDER ITEM. Review Returns Policy before purchase. Engineered for commercial roofing applications, this overflow roof drain features an integrated internal standpipe to manage excess water accumulation and prevent structural overloading. The unit is designed to meet rigorous industry standards, maintaining full compliance with ASME-, UPC-, and IPC- requirements for safe and effective drainage performance. This assembly provides a reliable solution for directing overflow water away from roof surfaces, ensuring consistent water management and protection for building infrastructure in accordance with established plumbing codes.