This Promenade Deck Drain is engineered for placement in roof top recreational and parking decks where the Insulated Membrane Assembly (IRMA) method of waterproofing is used. Protected on top by a 14" (355) sq. heavy duty grate with combined flashing collar and clamp, this Duco coated cast iron drain securely grips waterproofing membranes without puncturing for a leakproof installation. Underneath the grate is a 4"(100) perforated stainles steel gravel guard that protects drain lines from crushed gravel.
