
Watts SilverEagle™ Series
Watts SilverEagle™ Series
Shutoff Valve Options
Shutoff Valve Options
Inlet Options 
Inlet Options 
BFG Shutoff
PIV GxF
S- Silver Eagle Shutoffs
Outlet Options 
Outlet Options 
BFG Shutoff
OSY GxG
OSY FxG
NRS FxG
NRS GxF
OSY GxG
OSY GxF
Introducing a Backflow Preventer Shutoff valve for all your installation 
requirements. Typically, most backflow prevention manufacturers have 
provided limited types of shutoff valves. Watts Regulator is pleased to be 
the first company to offer a wide variety of shutoff valves to meet your 
installation requir em ents. From grooved butterfly valves, to valves equipped 
with 2" operating nut and post indicator plate, the Watts Regulator 
SilverEagleTMoffers the greatest flexibility in design.
™

Installation Considerations
The installation should be installed with adequate clearance around the valve to allow for inspection, testing, 
and servicing. A 12" minimum clearance is required between the lower portion of the assembly, and the floor or 
grade. The valve should be protected from freezing. Normal discharge and nuisance spitting are accommodated 
by the use of a Watts air gap fitting and a fabricated indirect waste line. Floor drains of the same size must be 
provided in case of excessive discharge. PIV gate valve available in 2"–8" sizes.
Wall Post
Typical Installation Series 757
Double Check Valve Assembly
Supplied
By Others
OPEN
Direction Of Flow
Post Indicator
Typical Installation Series 757
Double Check Valve Assembly
Direction Of Flow
Dimensions
21/2"-8" Groove x Flange
C
D
OPEN
Supplied
By Others
Wall Post
Typical Installation Series 957Z
Reduced Pressure Zone Assembly
Support
Drain
Direction Of Flow
Supplied
By Others
OPEN
STD TAP SIZE
1
/2": 21/2"- 4"
3
/4 ": 6"-8"
F
B
E
A
SIZE (DN) DIMENSIONS
in mm in mm in mm in mm in mm in mm in mm
2
21/
380 8203 4 101 10 254 123/
ABCDEF
65 7
1
2
/
191 3
3
4
/
95 7
1
4
/
184 10
7
/
3
8
276 3
4
95 2
/
314 4 101 3 76
8
1
2
/
4 100 9 229 41/2v114 10 254 143/4375 41/2114 41/4108 
6 150 101/
2
267 5
1
4
133 12 305 19 483 5
/
1
4
/
133 6
1
4
/
8 200 111/2292 53/4146 14 356 221/2572 53/4146 81/4210
64
159
S- Silver Eagle Shutoffs 0401
USA: 815 Chestnut St., No. Andover, MA 01845-6098; www.wattsreg.com 
Canada: 5435 No. Service Rd., Burlington, Ont. L7L 5H7; www.wattscanada.ca