21500 – Roof Drain: Large Sump, Clamp Ring & Poly Dome 21500-AE – Roof Drain: Large Sump with -AE Threaded Adjustable Extension 21500-AER – Roof Drain: Large sump with -AER Adjustable Extension using Threaded Rods 21500-16 – Roof Drain: Large Sump with -16 Internal Waterguard for Overflow Drains 22100 – Combination Roof Drain 22200 – COMBINATION DRAIN/OVERFLOW, MEDIUM SUMP 22500 – COMBINATION DRAIN/OVERFLOW, LARGE SUMP
