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AlumaWeld® RetroDrain®
The AlumaWeld RetroDrain is manufactured from spun aluminum. The drain has an extra large flange coated with plastisol for direct hot-air welding of JM PVC roof membranes. The drain flange has a depressed sump area to facilitate the easy drainage of all water from the roof surface. The strainer dome for the AlumaWeld RetroDrain is manufactured from cast aluminum and is securely attached with metal clips and a push-in fastener system. The Johns Manville Heavy Duty AlumaWeld RetroDrain incorporates the patented technology of the U-Flow® seal providing a mechanical watertight connection.
