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The Watts RD-980 is a large cast-iron ballast guard designed to protect roof drains on ballasted roofing systems
Size: VariousSquare Feet Per Roll: Varies by Roll SizeDrainage & Filtration Non-Woven fabrics allow high water flow and provide dimensional stability
and finishes
Water-Resistant Construction: Built with materials that can withstand moisture
Watts - RD-300-R - Overflow Roof Drain with 2 in. External Water Dam Z100F-8NH The Watts RD-980 is aThe Watts RD 300 R is a medium area overflow roof drain designed to provide secondary (emergency) drainage when primary roof drains are overwhelmed or blocked. Its epoxy coated cast iron body offers long term corrosion resistance, while the flashing clamp and integral gravel stop ensure a secure, watertight membrane connection. A raised external water dam sets the overflow height, and the self locking polyethylene dome helps keep debris out. The unit