Watts - GRD-640 - Green Roof Metered Overflow Drain ZC100F-2NH ZB400H-2NH

ZB400H-2NH

This grate boasts an open surface area of 150

reducing the risk of damage or cracking

The Wellcraft 2060 Egress Window Well extension will provide you an additional 12" height for a total of 72" tall

This product ships with eleven 48-inch oak stakes

Watts - GRD-640 - Green Roof Metered Overflow Drain ZC100F-2NH ZB400H-2NHThe 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