The CRD4IC is a 4" Inside Caulk Cast Iron Roof Drain, engineered for optimal water drainage on flat roofs. Constructed from robust cast iron, this roof drain ensures long-lasting performance and resistance to harsh weather conditions. Its inside caulk design allows for secure installation, preventing leaks and ensuring efficient water flow. This roof drain meets industry standards for durability and performance, making it suitable for both commercial and residential roofing applications. Enhance your roofing system's efficiency with this reliable cast iron roof drain from Braxton Harris Company.