Commercial Thin Membrane Drain Our new commercial deck drain uses a spun copper drain basin and flashing made of 20 ounce copper. Thin membrane design with 6" round brass grate. Manufactured in the USA by Thunderbird Products. Listing Back To Top Design Visualizer Previous Next Design Visualizer CADdetails™ You need to be logged in to view & download files. Login/Register New to CADdetails? Register to enjoy full access to unlimited 3D models, CAD drawings and specifications. It's free! Downloads Product Info About Media CAD PDF DWF DWG Printable CAD VWX DXF Download All Add to Project+ Favorite User Feedback Company Resources Back to top Brochures Product Brochure Resource Library