PVC AlumaWeld® RetroDrain® is a one-piece, spun aluminum body has a plastisol-coated flange for direct hot-air welding to PVC roof membranes. The drain flange has a depressed sump area to facilitate the easy drainage of all water from roof surface.
AlumaWeld® RetroDrain® Installation Instructions
Heavy Duty TPO RetroDrain®
Specialty Roofing Products Catalog