Watts - GRD-640 - Green Roof Metered Overflow Drain Tactile Paving This drain features an epoxy-coated

This drain features an epoxy-coated cast-iron body with an anchor flange and dual weepholes for enhanced drainage around the perimeter

Dura-Coated Cast Iron Upper & Lower Bodies: Strong and corrosion-resistant construction that holds up under load and weather exposure

heavy grates

resisting corrosion and weather exposure while maintaining structural strength

Non-Tilt Grate: Designed to handle vehicular loads while resisting displacement and maintaining high flow capacity

Watts - GRD-640 - Green Roof Metered Overflow Drain Tactile Paving This drain features an epoxy-coatedThe Watts GRD 640 is a stainless steel metered overflow drain designed for green roof and planter applications where controlled secondary drainage is required. Its epoxy coated cast iron body provides long term durability, while the perforated stainless steel gravel guard with secured solid cover helps prevent debris and ballast intrusion. The ABS standpipe includes a 5 8 inch orifice to regulate overflow, and the drain comes standard with a no hub