Product Description Oatey PVC Roof Drains offer superior rainwater drainage while resisting debris and material buildup. Available in a variety of sizes, these roof drains feature a black cast iron or UV-stable ABS dome with a free-flow area that provides more than 200 square inches of protection. Five anchor positions on the drain base ensure secure installation, and the gravel guard collar easily clamps to the drain base with a twist-and-lock feature. Oatey products have earned the trust of plumbing professionals for over 100 years. From the Manufacturer Oatey products can be found in residential and commercial applications and have achieved excellent brand name recognition with consumers. All products are backed with the highest quality technical and customer support programs in the industry