1010CID Jay R. Smith 15.25" Low Profile Dome Used in flat roof of any construction. Large low profile dome provides sufficient free area for quick drainage of rain water and protects the drain sump and connected piping from the intrusion of debris. Wide clamping surface holds flashing and roofing materials without puncturing.Speed of installation. Roof drains can be pre-assembled to deck plate and placed as one unit from the top roof surface, saving time.Secure Installation. Large Roof Deck Plate is easy to install using fasteners from the top of roof only. No underdeck clamp required means less hardware and time savings.Installation from above means less time on ladders or lifts and less overhead work. The only task after installation is the actual pipe connection, made to a secured assembly.Reliability. The drains are installed in a recess to prevent a water dam.Simplicity. Roof penetrations are square, not round, saving time.