Watts GRD-640 User Manual

Green Roof

Tag:

GRD-640

Metered Overflow Drain

SPECIFICATION: Watts Drainage GRD-640 epoxy coated cast iron green roof drain overflow drain with flashing clamp,

ABS standpipe with 5/8”(16) orifice, perforated stainless steel gravel guard with secured solid cover, and no hub
(standard) outlet.

12”(305)

11”(279)

5/8”(15)

HOLE

16 5/8”(422)

13 3/8”(340)

4”(102)

DIA. PIPE

Pipe Sizing (Select One)

Suffix Description

2"(51) Pipe Size (NH Only)

2

3"(76) Pipe Size 3

4

4"(102) Pipe Size

5"(127) Pipe Size (NH Only)5
6"(152) Pipe Size6

8"(203) Pipe Size8

10

10”(254) Pipe Size (NH Only)

Outlet Type (Select One)

Suffix Description

No Hub (MJ)

NH

Push On P
Inside CaulkX

Options (Select One or More)

Suffix Description

-13

Galvanized Body & Flashing
Clamp

-B Sump Receiver

Underdeck Clamp

-D

-F

Adjustable Extension Flange

-US Buy American Compliant

5 1/2”(140)

PIPE SIZE

Deck opening 14-1/2" (368)
with sump receiver 18" (457)

ES-WD-GRD-640 USA 1406 GRD-640