Watts GRD-640 User Manual
Grd-640, Green roof metered overflow drain

ES-WD-GRD-640 USA 1406
GRD-640
Tag:
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.
GRD-640
Green Roof
Metered Overflow Drain
Deck opening 14-1/2" (368)
with sump receiver 18" (457)
Pipe Sizing (Select One)
Suffix
Description
2"(51) Pipe Size (NH Only)
2
3"(76) Pipe Size
3
4"(102) Pipe Size
4
5"(127) Pipe Size (NH Only)
5
6"(152) Pipe Size
6
8"(203) Pipe Size
8
10
10”(254) Pipe Size (NH Only)
Options (Select One or More)
Suffix
Description
-13
Galvanized Body & Flashing
Clamp
-B
Sump Receiver
-D
Underdeck Clamp
-F
Adjustable Extension Flange
Outlet Type (Select One)
Suffix
Description
No Hub (MJ)
NH
Push On
P
Inside Caulk
X
-US
Buy American Compliant
16 5/8”(422)
13 3/8”(340)
4”(102)
DIA. PIPE
12”(305)
11”(279)
5/8”(15)
HOLE
5 1/2”(140)
PIPE SIZE