Roof Drains: RD-One Piece Combo Overflow RD-250 cast iron combination roof drain/overflow with deck flange, drain body, flashing clamp with integral gravel guard, overflow standpipe with membrane clamp, self locking cast iron dome, and no hub outlets. Available in 2", 3" and 4". 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 Specs Specs Download All Add to Project+ Favorite User Feedback Company Resources Back to top Brochures Aluminator Product Brochu… Direct Connect Product Br… Retrofit Drains Product B… Roofing Accessories and E… Strainers and Drains Prod… Vents and Breathers Produ… Aluminator Installation G… Enpoco Pak Roof Drain Ins… Extended Aluminator Insta… Proliner Installation Gui…