Available models, Materials, Approvals – Watts LF919 User Manual
Page 2: Dimensions — weights, Air gaps, Pressure — temperature
LF919QT, LF919QT-S
Size (dn)
dimenSionS
STrainer dimenSionS
weighT
A
B
C
D
E (LF)
F
G
H
M
N
in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs.
1
/
2
15 9
1
/
2
241 6
7
/
8
175 2
7
/
8
73 12
3
/
4
324 5
3
/
4
146 3
3
/
8
86 1
7
/
8
48 1
9
/
16
40 2
3
/
4
70 2
1
/
4
57 5.8 2.6
3
/
4
20 12
1
/
8
307 7
7
/
16
188 3
1
/
2
88 15
1
/
2
393 7
11
/
16
195 3
5
/
8
92 2
1
/
16
52 1
9
/
16
40 1
5
/
8
41 3
3
/
16
81 8.3 3.7
1 25 14
1
/
2
368 8 202 3
7
/
8
98 19
3
/
16
487 9
3
/
16
233 4 102 2
7
/
16
62 1
9
/
16
40 2
1
/
8
54 3
3
/
4
95 11.8 5.4
1
1
/
4
32 18
1
/
8
461 11
7
/
16
290 5
1
/
8
129 23
1
/
4
591 11
11
/
16
297 5
1
/
8
130 2
5
/
8
67 2
1
/
2
64 2
1
/
2
64 4
7
/
16
113 22.3 10.1
1
1
/
2
40 18
3
/
4
476 11
7
/
16
290 5
1
/
8
129 25
1
/
16
637 11
11
/
16
297 5
5
/
8
143 3
1
/
8
79 2
1
/
2
64 3 76 4
7
/
8
124 28.3 12.8
2 50 21
1
/
16
535 12
1
/
16
307 5
5
/
8
142 28
13
/
16
732 13
3
/
8
340 5
15
/
16
151 3
7
/
16
87 2
1
/
2
64 3
9
/
16
90 5
15
/
16
151 37.3 16.9
Available Models
Suffix:
QT – quarter-turn ball valves
S – bronze strainer
Materials
Body: Lead Free* Cast Copper Silicon Alloy
Discs: Silicone rubber
Check Seats: Replaceable polymer
Cover Bolts: Stainless steel
Approvals
Approved by the Foundation for Cross-Connection Control and
Research at The University of Southern California. (for sizes
3
⁄
4
"-2")
2
a
n
d
e
g
h
F
m
Dimensions — Weights
B
C
a
B
C
Air Gaps
air gaP modeL
SizeS
dimenSionS
weighT
A
B
C (NPT)
in. mm in. mm in. mm lbs. kg.
919AGC
1
⁄
4
" – 1" 2
3
⁄
8
60 3
1
⁄
8
79
1
⁄
2
13 .63 .28
919AGF 1
1
⁄
4
" – 2" 4
3
⁄
8
111 8
7
⁄
16
214 2 50 3.5 1.6
Pressure — Temperature
Temperature Range: 33ºF – 180ºF (0.5ºC – 82ºC)
Maximum Working Pressure: 175psi (12.1 bar)
1013