CRS Inc has a great selection of roof drains and drain kits in stock and ready to ship. We stock cast iron drain domes, rings and top assemblies by companies like Zurn, Smith and Josam.  We also offer drain kits by IPS, as well as retro-fit drains by OMG Roofing Products.  If you do not see what you are looking for, feel free to contact us at 1 (800) 267-2308 and as for an E-Commerce Representative.