Standards, How it works, Capacity dimensions – Watts SC8 User Manual
Page 2
Standards
Tamper-proof vacuum breaker (Watts Model 8B) is tested and
approved in conformance with Standard 1011 of the American
Society of Sanitary Engineers and by all principal cities, states
and areas having these requirements.
IAPMO Uniform Plumbing Code
How it Works
Series SC8 is a combination hose bibb with separate tamper-
proof vacuum breaker - to be attached after installation. Under
normal conditions, the inner diaphragm opens to permit gener-
ous flow, while the circumferential diaphragm closes the air
vents.
Should supply pressure drop and a backflow begin, the inner
diaphragm immediately closes to prevent backflow into the
main line, while the circumferential diaphragm opens the air
vents to break the vacuum.
bars
psi
2.8
40
2.4
35
2.1
30
1.7
25
1.4
20
1.0
15
.7
10
.3
5
0
1
2
3
4
5
6
7
8
9
10
gpm
0
3.8
7.6
11
15
19
23
27
30
34
38
lpm
Flow
Suppl
y P
ressur
e
Performance Curve
Capacity
Dimensions
MODEL
ORDER NO.
SIZE (DN)
DESCRIPTION
DIMENSIONS
WEIGHT
i
A
B
C
in.
mm.
in.
mm.
in.
mm.
lbs.
kgs.
NO KINK HOSE FAUCET with tee handle and vacuum breaker
SC8-1
611150
1
⁄
2
"
15
Male I.P. or Copper Connection
3
1
⁄
8
"
79
2
1
⁄
2
"
64
2
1
⁄
4
"
57
.75
.34
SC8-2
611250
3
⁄
4
"
20
Copper Connection
3
1
⁄
8
"
79
2
1
⁄
2
"
64
2
1
⁄
4
"
57
.75
.34
LAWN FAUCET (Sillcock) with cast iron handwheel and vacuum breaker
SC8-3
611350
1
⁄
2
" or
3
⁄
4
"
15 or 20
Regular Pattern, Dual Connections
3
1
⁄
4
"
83
2
1
⁄
2
"
64
2
1
⁄
4
"
57
.75
.34
SC8-4
611450
3
⁄
4
"
20
I.P. Regular Pattern
3
1
⁄
4
"
83
2
1
⁄
2
"
64
2
1
⁄
4
"
57
.75
.34
HOSE BIBB HEX SHOULDER with tee handle
SC8-5
611550
1
⁄
2
"
15
I.P. Inlet Hose End
3
5
⁄
8
"
92
2
51
2
1
⁄
4
"
57
.75
.34
SC8-6
611650
3
⁄
4
"
20
I.P. Inlet Hose End
3
3
⁄
4
"
95
2
51
2
1
⁄
4
"
57
.75
.34
Note: Models SC8-1 through SC8-5 are packaged with the Model 8B vacuum breaker with break-away set screw. The SC8-6 model is packaged with the
Model 8 which has an allen head set screw.
C
A
B
ES-SCB 0515
© Watts Regulator Co., 2005
USA: 815 Chestnut St., No. Andover, MA 01845-6098; www.wattsreg.com
Canada: 5435 North Service Rd., Burlington, ONT. L7L 5H7; www.wattscanada.ca